iOS Dev Tools

The greatest iOS development tools, including websites, desktop and mobile apps, and back-end services.
Updated daily by Adam Swinden.

If you have any suggestions for tools that you would like to see added to the list, please let me know by email, Twitter or Facebook.

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Avocode

A tool for Mac, Windows, and Linux that helps you turn your designs into code. Avocode lets you open and inspect PSD & Sketch designs, before giving you tools to export native code for a variety of platforms including iOS (Swift), web (CSS), Android, and React Native. You can also select any layer and export as a PNG, SVG or JPG up to @4x resolution. Version control keeps track of all your revisions, and collaboration tools such as sync plugins and Slack integration make it easy to share designs with your team.

Other Similar Tools

Sketch Focus

A plugin for Sketch that aims to help boost your productivity while designing. Sketch Focus lets you add notes and tasks to your Sketch document, optionally linking them to your layers. When you select an item, Sketch Focus will automatically select, centre and zoom to any linked layers. You can also filter by items marked as important or items linked to visible or selected layers, and search for items by text.

Sympli

A design handoff and collaboration tool for designers and developers. Sympli lets designers easily share style guides, specs, bitmaps and vector assets with developers in the best format to make it easier to implement. It starts with Sympli plugins for Photoshop and Sketch so designers can stick to the tools their used to. From there they can export their designs and share them with their teammates. Then the developers on the team can use the Xcode and Android Studio plugins to get every detail of the design just right. You can also explore designs and download assets through the Sympli web app.

iOS Design Kit

A huge library of app templates and iOS UI elements, combined into high-quality source files for Sketch and Adobe Photoshop. iOS Design Kit includes over 250 screens in 15 popular categories, as well as a library of interface elements, such as icons, search bars, alerts, tab bars, segmented controls, switches, keyboards and more. The whole lot is available for one fee, or you can get your hands on a collection of 62 screens and many core components for free!

Stark

A colour-blind simulator and contrast checker for Sketch. Stark is a Sketch plugin that helps you keep accessibility in mind when designing your apps. The preview window lets you see how your design looks for those who don’t see the way a typical person does. You can select from 8 different colour profiles to simulate the various forms of colour-blindness, or use the contract checker to ensure your colours, visuals and typography provide the best readability, legibility and contrast.

Wake

A platform that helps designers share their work with the rest of their team. Wake provides a handy Mac app that lets you share designs without leaving Sketch, Photoshop or Illustrator with a simple keyboard shortcut. Designs are uploaded to the web where they are viewable by the rest of your team. Teammates can find what they're looking for by searching for people, tags, file types and dates, before adding annotations and feedback. There's also an iOS app for viewing and uploading designs on the move, as well as Slack and HipChat integration.

Evrybo

An online tool to create interactive prototypes and easily get feedback on your designs. Evrybo lets you link all your designs together and add transitions to get high-fidelity mobile, web and watch prototypes. You can then invite an unlimited number of people to give feedback with a public link. Clients and colleagues can add comment annotations direct on your designs. You can also view the entire collaboration history of your project including comments, invitations, files uploaded and more.

Auto Layout for Sketch

A Sketch plugin that lets you define layout constraints similar to Auto Layout on iOS helping you design interfaces for all device sizes. Auto Layout for Sketch uses simple pins to anchor elements to a edge or centre, or more advanced constraints that allow your designs to adapt to size changes in your artboards. Once your constraints are defined you can quickly create previews at a number of different standard screen sizes for most major platforms including iOS, Apple Watch, Android, Windows Phone 8, and more.

Apple UI Design Resources

The definitive iOS design resources created by the designers at Apple. The Apple UI Design Resources include Photoshop and Sketch templates, and other UI materials for quickly designing iOS apps. They include templates and guides, colour palettes, and the official San Francisco typeface. The included icon and glyph production files have even been preconfigured to automate asset production using Sketch slices or Adobe Generator for Photoshop CC.

A Nice Red

A super simple website for generating UI colours that complement your brand. A Nice Red lets you simply type in the hex code for your primary brand colour or pick it from the pop-up colour palette, and it will generate three colours that should fit nicely with your brand; a green for success states, a red for errors and an amber for warnings. Clicking a generated colour will copy the hex code ready to be pasted into the Xcode colour picker.

Adaptivity

A simple iOS app that helps you visualise how Size Classes and layout margins look on real devices and how they change with respect to orientation, iPad multitasking (i.e. Slide Over/Split View) and Dynamic Type size changes. Adaptivity displays guides, sizes in pixels or points and current size classes over the top of many standard UI elements including pop-overs, modal presentations, split view controllers, tab bar controllers, and more. There's even two Notification Centre widgets, a notification content extension and an iMessage app to help you size up all kinds of apps.

Mocks 2

A mac app for designing mockups of iOS applications and screens. Mocks comes with a built-in collection of graphics depicting iOS UI controls and widgets (such as buttons, toolbars, and text fields). You can drag these controls from the Library palette to the Canvas area where you compose your mockups. Alignment guides (both automatic, and user-created) help you keep your designs in line, and a powerful bezier pen tool plus a large collection of shapes, arrows, images, and magnetic lines let you customise you designs further.

Origami Studio

The latest version of Facebook's prototyping tool based on their Origami plugin for Quartz Composer. Origami Studio is a fully featured design tool that lets you create prototypes with layers from Sketch, masks, particle systems, text, live cameras, and more. You can create and share your own reusable components, or pick from the library of pre-built Material and iOS components. Then you can bring it all to life with interactions and animations, all while previewing your designs in real time on device using the Origami Live app.

SketchViewer

A web app to easily view, version, & share your Sketch files online. Once you've uploaded your Sketch files, SketchViewer displays them using the Canvas View that lets you pan and zoom your artboards. If you upload multiple versions of your Sketch files you can go back in time and view, compare, and pixel diff past versions. You also get a shareable link so you can demo your designs to your entire team.

Flinto for Mac 2

A comprehensive app prototyping tool for Mac that allows you to create anything from simple tap-through prototypes, to comprehensive prototypes with impressive interactions. Flinto for Mac 2 introduces the new Behaviour Designer feature that allows for the creation of micro-interactions that happen within screens. Things like scroll-based interactions, looping animation, toggle switches, button effects and many others can be created. Unlike Flinto Lite, Flinto for Mac 2 has a one-off price and includes a 14 day free trial.

LittlePlane

A collection of free SVG stencils ready to drop into your wireframe designs. LittlePlane makes creating wireframes quick and easy by removing the need to design every element. Stencils are tagged and categorised so it's easy to find the UI element you need for mobile or desktop, and each design is downloadable as an SVG so will work with most design apps and is scalable to any size. They are also working on a Mac app that brings access to all stencils with search and drag & drop to your desktop.

Figma

An interface design tool with real-time collaboration. Figma lets multiple people work on the same files, and even the same elements, at the same time, with revisions constantly being saved with version history. If you're not a designer you can follow along with someone else's screen in Presentation Mode or view the design mirrored to a mobile device with Live Device Preview. You can also import your Sketch files to get started. Figma works on any operating system with desktop apps for Mac and Windows.

Vectr

A free graphics editor used to create vector graphics easily and intuitively. Vectr is available online for can be downloaded for Mac, Windows or Linux for offline use. It offers all the typical features and tools you'd expect making it a great free option for designing iOS apps. Everything created in Vectr is available online for real-time collaboration. Others can watch you create and edit designs live, whether you’re in the web app or desktop version. Vectr has just left beta, and the developers have an open roadmap with more great features coming soon.

Sketch 40

Extremely popular vector design app for Mac. Sketch 40 is the latest version of the Adobe Illustrator alternative and comes with powerful new vector editing features that let you edit multiple shapes at the same time. You can also now perform non-destructive text transforms so you to easily convert text to uppercase or lowercase. Bohemian have also recently released their first two official plugins to help with compression on export.

iOS 10 UI Kit

A massive UI template including most iOS 10 UI elements as vector assets. The iOS 10 UI Kit is available for Photoshop and Sketch and includes most screens and common interface elements, controls, shapes, containers and icons. The files are well organised, making good use of Photoshop's artboards and Sketch's Symbols, Text Styles and Shared Styles. Like most of Apply Pixel's templates, the iOS 10 UI Kit is available to subscribing members to support future updates and new templates.

Tster

A prototyping tool for iOS. Tster lets you build wireframes and high-quality mockups directly on iPhone so you can run tests using real assets, transitions and interactions on your own device without writing any code. You can create your designs using shapes, text, icons and images, or pick from a library of native UI elements including tab bars, nav bars, table views, alerts, and loads more. Then you can add interactions and transitions before exporting to Sketch or sharing by URL.

Colour Contrast Analyser for Sketch

A simple plugin for Sketch that calculates the colour contrast of two layers and evaluates it against the Web Content Accessibility Guidelines. Colour Contrast Analyser for Sketch will give you a score of AAA, AA or fail because of a lack of contrast. And even when you do not need to meet those requirements, you can get a feeling for the contrast when you get used to the values. If only a single layer is selected, than it will calculate with its artboard background colour. Making your app accessible to more people is extremely important and this plugin should make designing it easier.

Adobe Experience Design

A Mac app that lets you design and prototype websites and mobile apps. Adobe Experience Design is an all-in-one tool for UX designers with which you can quickly create wireframes and visual designs, preview changes in real time, and share prototypes with your team for instant feedback. As Experience Design is part of Creative Cloud it also seamlessly integrates with Adobe's other apps so you can bring your Photoshop and Illustrator assets straight into the app. Experience Design is currently free to download and try while in Preview.

Device Mockups

A collection of ready to use vector device mockups that you can use to create product mockups, UI flows, wireframes, illustrations for mobile apps, or presentations. Device Mockups currently includes 32 Apple devices including all iPhones from the original to iPhone 6s Plus, Apple Watch, iPad including Pencil, laptops and desktops, even Apple TV with display. Each device is provided in Sketch, Illustrator and SVG formats, using symbols and styles to make them easily customisable. It also includes Powerpoint & Keynote ready files making them ideal for presentations.

Prism

A plugin for Sketch that creates beautiful colour palette artboards automatically from the colours in your Sketch project. Prism takes your 'Document Colours', and with a single command, creates a fully customisable colour palette with automatic colour naming, and the colour expressed in a handful or different formats. You can also export the colours into code in several formats, including UIColor in Objective-C and Swift. Everything is customisable allowing you to change the palette template or add new export formats.

Sketchode

A free Sketch plugin and Mac app combination that lets designers export an inspectable graphical representation of a design project that developers can use as detailed design specification. Sketchode gives developers access to fonts, colours, opacity, size, position, shadows, images and loads more design details without having to launch Sketch and view the original designs. It also integrates with JIRA so you can automatically upload and download design projects directly from issues.

Size Classes

A simple reference guide that describes what size classes are used across all iOS devices in various scenarios. Since the iPhone 6 Plus and the addition of multitasking on the iPad, it has become difficult to keep track of which size class applies to which device in all scenarios. Size Classes details the horizontal and vertical size class for all iPhones back to iPhone 4s and all iPads back to iPad 2 in 10 different scenarios including modal, popover, split views and multitasking.

UI Check

An iOS app that allows you to conveniently measure UI elements directly from your screenshots.
 Simply select a screenshot from your camera roll and tap or double tap to measure pixel and point dimensions, rectangles and angles. You can also tap and hold to get the hex colour for any pixel under your finger, or add guides for screen halves, thirds or the iOS defaults. UI Check is a useful little app for designers and developers to double-check prototypes and make sure the layout is pixel perfect.

Silver Flows

A Sketch plugin that lets you build lightweight mobile prototypes from within your Sketch document. Silver Flows is perfect for making quick, flow-based prototypes, but it also plays nice with Framer.js to help you add micro-interactions to your prototypes. Out of the box you can convert layers to fixed headers and footers for realistic scrolling, add editable input fields, link artboards together with native push, pop, modal and dismiss transitions, embed web views and get access to hardware features such as the camera.

Demonstrate

A prototyping app for iOS that lets you create native app demos without writing any code. Demonstrate prototypes make use of native transitions & gestures, allowing you to import your paper or whiteboard sketches and designs from the photo library or Dropbox. You can then add hotspots and link screens to create complete workflows, before sharing the project in editable or play-only format. Demonstrate is free to try with 1 prototype and 4 screens but can be unlocked for unlimited use with a single in app purchase.

Proto.io

A prototyping tool for creating interactive wireframes and mockups. Proto.io provides an easy to use drag-and-drop interface and built-in, native-looking UI libraries for iOS, Android and Windows that you can use with your custom designs. You can then add touch events and complex animations before testing on a real device using the companion iOS app. You can share your prototypes with friends and colleagues to get instant feedback or export the screens as great looking PDFs, images or HTML demo.

iOS 10 UI

A complete UI kit created in Sketch for the new iOS 10 UI. iOS 10 UI includes all the new screens, apps, icons, effects and much more from the latest version of Apple's operating system. Every element is created using vectors so is infinitely scalable and resizable, and makes use of Sketch's Symbols for easy customisation and re-use. Many elements have been assembled into templates for the new iOS 10 widgets and notifications which make a create starting point for designing for iOS 10. iOS 10 UI is free to download and open source on GitHub.

Platforma

A collection of over 200 screens for iOS guidelines, divided into 26 popular content categories including navigation, search, settings, profiles, walkthroughs, and loads more. Platforma can be used to quickly create mockups and prototypes without having to design every element from scratch. The kit also includes several pointers and gestures elements so you can mark transitions and interactions to build a UX flowchart. Platforma is currently available for Sketch and Photoshop with Illustrator coming soon.

Atomic

A web-based, enterprise-grade product design and prototyping platform that enables teams to design, iterate and implement together. Atomic lets you create designs and prototypes from scratch, or bring in assets from another design tool. You can collaborate with your team on the same designs at the same time with real-time updates and changes, and unlimited undo lets you slide back to any point in time in your document. You can prototype nuanced interactions and transitions, and preview them on your mobile device before sharing with others to test and give feedback.

Coolors

A simple iOS app for generating great looking colour schemes at light-speed just by tapping on the screen. Colours lets you browse thousands of popular palettes made by other creatives, or you can type in your colours to get nice matching colour combinations instantly. Once you've created your favourite favourite colour palettes, you can save them to your account or copy, export or send via email. In addition to Coolors for iOS, there's also a free web version along with an Android app and Photoshop and Illustrator plugins.

Adobe XD

A new OS X app from Adobe for designing and prototyping mobile apps. Adobe XD lets you quickly create wireframes and visual designs, preview changes in real time, and share prototypes with your team for instant feedback. It includes many of the tools you'll be familiar with from other Adobe products along with intuitive new tools for adding interaction and animation to you prototypes. It's currently available for free during the beta period as new features are being added each month.

PaintCode Plugin for Sketch

A plugin for Sketch that lets you turn your designs into Objective-C or Swift just like Paintcode. PaintCode Plugin for Sketch brings the full power of PaintCode to Sketch allowing you to export all your colours, gradients, shadows, icons and images as UIKit and Core Graphics code. The plugin generates .h/.m or .swift files ready to be dropped straight into your Xcode project and you have control over how the code is formatted, including indentation, spacing, and curly brace positioning.

Neonto

A design tool that lets you design and build app prototypes and export real native code to use in Xcode. Neonto includes essential mobile building blocks such as navigation bars, tab bars, table views and collection views. But unlike similar tools, these are real native components, not fake HTML look-a-likes. For designers, there is a Sketch plugin to easily get your designs into Neonto, and for developers, you can export code in ready to use Xcode projects with no framework or other runtime dependencies. Neonto is free for non-commercial use with other plans and licenses for full use.

Sketch App Rocks

A website for Sketch enthusiasts. Sketch App Rocks collects together high quality resources by designers and developers from all around the world, which help user interface designers to optimise their workflow and to make designing in Sketch easier and more fun. The content posted on the site includes, plugins, resources such as iconsets and UI kits, educational posts such as tutorials, events and more. The collection is vast so you'll definitely find something interesting if you're into using Sketch.

AnimateMate

A Sketch plugin that lets you produce and export simple animations straight out of Sketch. AnimateMate is based on keyframes, so you start by creating your main keyframes and AnimateMate will handle all the animations in between. You can then add one of several easing functions to get the effect your are after. Animations can be applied to single layers or grouped layers, and can be offset to create sequences of animations. Once your animation is complete you can export to an animated GIF or a sequence of PNGs.

Craft

A free plugin suite for Sketch and Photoshop that helps you put real data in your designs. Craft includes three separate tools: Type, which lets you add real, relevant content automatically, generated or from the web, including names, dates, addresses, headline, articles, and more; Photos, which gives you access to photos from Dropbox, a private folder, or the web to place straight into your design; and Duplicate, a sophisticated clone tool that can quickly contextually duplicate any design element to speed up building out your designs.

Marvel

A prototyping service that lets you create mobile prototypes with screens designed directly in the online editor or added as images from Sketch or Photoshop. Marvel lets you link all your designs together with gestures and transitions to make your prototype feel just like a real app. Once your prototype takes shape, you can share your projects and get real-time feedback on your designs. Clients and colleagues can comment directly on each screen or drop annotations. There are also Marvel apps for iOS and Android that let you create prototypes from paper sketches and download offline prototypes including Apple Watch.

IBAnimatable

A prototyping framework that lets you design and prototype UI, interaction, navigation, transition and animation for App Store ready apps in Interface Builder without writing a single line of code. IBAnimatable aims to be designer friendly with a Sketch style setting panel on Attributes Inspector to lower the learning curve for using Interface Builder. But unlike most other prototyping tools you can use the output of the design directly in your production ready apps. It also supports animation design in Swift playgrounds, Auto Layout and Size Classes and navigation and transitions using segues.

Inspr

An iOS app tool for creating app mock-ups right from your iPhone or iPad. Inspr includes built-in templates, presets and icons, and takes no design or coding skill to use. It provides a simple drag and drop interface with several native components, hundreds of customisable settings, over 200 hand-crafted icons, dozens of hand-picked stock images, and several popular color palettes. It also integrates with POP, to make your mock-ups interactive. Once you create your designs with Inspr you can import them to POP and generate an interactive prototype ready for sharing.

Creo

A new prototyping and development tool for OS X. Creo combines the design and development of mobile apps into one application. App creation is normally split into two camps: design and development. This application combines those two steps, allowing users to concentrate on creating their app. It offers drag-and-drop controls, classes, and objects that allow you to build your app's navigation and features. Creo also uses the CreoKIT Objective-C/Swift framework that enables it to execute any iOS code on the Mac so you can preview your running code directly in the Creo app.

Composé

An editor for creating interactive iOS prototypes and apps. Composé provides a freeform editor that lets you individually position objects in a scene to create complex layouts. Layouts can include many standard iOS UI components including table views and collection views, images, tab bars, navigation bars, and many controls such as switches and sliders. Unlike many prototyping apps, Composé lets you add real data with support for JSON, CSV and RSS which can be stored in datasets in your prototype. It will even generate Cocoa Touch code in Objective-C and storyboards.

zeroheight

A tool that aims to keep designers and developers in sync. zeroheight converts mobile designs into developer resources and provides a simple mechanism for assets to be shared across teams. Designers start by uploading their designs using the Sketch or Photoshop plugins, and then share a link to the zeroheight web app with the developers. Developers can then run a single simple command in their terminal to automatically download all developer resources (@1x, @2x and @3x in asset catalogs) straight into their Xcode project. It can even automatically sync changes to the designs.

Sketch Plugins

A huge collection of third party Sketch plugins compiled by the creators of Sketch themselves. The list includes over 100 Sketch approved plugins covering everything from content generators and sync tools to iOS export and third party app integrations - if it's been created for Sketch (and it's any good), it's probably on the list. The list is also searchable to help you find the plugin you need.

Fluid for Sketch

A Sketch plugin that provides a means to create responsive designs based on Auto Layout constraints. Fluid for Sketch, like Auto Layout constraints, allows you to pin, offset, centre, and size relative to parent group, parent artboard, or previous sibling layer. You can then view your artboards at different sizes (Mobile, Tablet, Desktop) using Preview Mode. Fluid might not completely match Auto Layout, but it'll certainly help you think about and design for adaptive layout when using Sketch.

AppStarter

A web app and companion iOS app that lets you build native iOS prototypes online. AppStarter utilises common web technologies like XML, CSS and JavaScript, which the AppStarter compiler converts to a 100% native iOS app. Currently, AppStarter provides XML support for 13 of the most important UIKit classes including UIView, UIImageView, UIButton, UILabel, UIWebView and more. It also provides access to several frameworks and classes such as alerts, clipboard and timers using Javascript functions. If you're a web developer AppStarter could be a quick way to get a prototype up and running.

Facebook Design Resources

A collection of free design resources from the designers at Facebook. Facebook Design Resources currently includes: the previously featured Origami, a prototyping toolkit for Quartz Composer; Diverse Device hands, a set marketing images of various smartphones held by two different diverse hands; a complete iOS 9 iPhone GUI for Sketch and Photoshop; and a Medium blog covering the designers experiences. It's already a great collection, but I'm sure they are planning to add more soon.

Gradient Creator

An OS X app that allows you to simply generate all the code required for making CAGradient layers in Objective-C and Swift for iOS and OS X. Input your colours using hex values, the pen drop tool or simply pick a colour from the colour picker view. Change the angle of your gradient with a single click or input them manually, then you can copy the generated code ready to paste into your project. You can also easily convert your single colour hex code to UIColor, NSColor, and CGColor.

uiFaces

A collection of nearly 10,000 real profile pictures for use as samples avatars in UI mockups. All of the uiFaces avatars come from real Twitter users who have given permission for their face to be used in mockups. There is also an authorised section that includes people who are happy for their avatar to be used on live products as well. For those that what to automate finding avatars even more, there is also an API that you can use to fetch random or specified usernames in JSON.

Content Generator for Sketch

A plugin for Sketch that lets you quickly create dummy data for your designs. Content Generator for Sketch can generate photos using Unsplash, profile pictures using Uifaces, user names using Uinames, dummy text and custom strings using a combination of plain text, random number generators and random item from an array. Content Generator for Sketch can already be a real time saver when creating design mockups and more data types are coming in the future.

iOS 9 GUI for Sketch

A free download of every element, including devices, icons and keyboards vectorised in Sketch ready to adjust, resize and export at any resolution. iOS 9 GUI for Sketch includes every element painstakingly recreated in vector including bars, buttons, controls along with several screenshots from iOS (e.g. home screen, Control Centre, Siri) and built-in apps (e.g. Wallet, Apple Music, Activity). It respects the latest Apple guidelines and was carefully compared against the newest screenshots.

Flinto for Mac

An OS X app for creating mobile app prototypes with animations, gestures and scrolling. Flinto for Mac goes way beyond the original online version of Flinto by letting you create anything from simple tap-through prototypes, to comprehensive prototypes with impressive interactions. It requires no programming or timelines in order to create slick gestures and animations including custom spring or cubic-bezier easing, and your designs can be viewed in realtime on your iOS device with the companion app.

Sketch Toolbox

A super simple plugin manager for Sketch. Sketch Toolbox gives you quick and simple access to countless fantastic plugins for Sketch. It lets you browse the most popular plugins, download and install them with a single click and automatically keeps them up to date. Each plugin includes a title, short description and a link to the source on GitHub. It's like an Alcatraz for Sketch.

Framer

A OS X app and Javascript framework for prototyping mobile apps. Framer lets you validate and test your design decisions and interactions by writing simple code to create functional prototypes. With just a few lines of code using CoffeeScript, you can create expressive animations and interactions that you can preview in the OS X app or on your device using the companion mirror apps. The framework is really flexible, giving you options for visual filters, animation curves, 3D effects and transformations, and loads more.

Principle

A Mac app for creating animated and interactive user interface designs. Principle can be used to design everything from a short animation to a slick user interaction, or even an extensive multiple screen app. You can export your designs as a video or an animated gif ready for sharing or, using the Principle Mirror app, you can also interact with your design on your device or view designs that others have sent you. Principle isn't just for iPhone apps either, you can choose a device preset (which includes Apple Watch) or enter a custom Artboard size.

Zeplin

A OS X app and service for turning your Sketch designs into styleguides and resources. Zeplin is designed with both designers and developers in mind. Designers can import their Sketch designs and create their styleguides from colours and fonts used in the designs. Developers can then inspect the same spec to view layout information for every layer in points or export colours to Objective-C or Swift and image assets to PDF or PNG in all the right sizes ready to be dropped into Xcode. Also, every screen in Zeplin has a link so users without the OS X app can view everything online.

Pixel Winch

A screen measurement app for OS X that's quick and easy to use. Pixel Winch lets you select a region on the screen which is automatically magnified and centred on your display. Take measurements using any combination of the included tools. When finished, simply press escape to dismiss Pixel Winch. Tools include line and rectangles to draw measurable shapes, and grapples that automatically detect edges. Pixel Winch also keeps a history list of your past images and measurements that can be configured to be automatically deleted.

Marvel for Apple Watch

An iOS app that lets you view your sketches and design mockups on Apple Watch. Marvel has recently been updated let you build your app prototypes on the web or directly on your iPhone or iPad and then beam them directly to Apple Watch and preview. Even if you don't have an Apple Watch, you can still create and view prototypes using the web app which gives you a clickable and scrollable recreation of your mockup in an Apple Watch frame.

PaintCode Plugin for Origami

A plugin for Quartz Composer from the creators of PaintCode that let you to get the image of any canvas from your PaintCode document into an Origami prototype. The PaintCode Plugin for Origami will automatically create input ports for all the parameters of your canvas which you can change directly in Quartz Composer or connect to other parts of your Origami prototype.

Ghost Ship

A UI kit comprised of a complete set of retina-ready design assets. Ghost Ship UI Kit comes with 100 UI template PSDs across 8 different categories such as forms, on-boarding, navigation and multimedia along with loads of individual UI elements like buttons, switches and sliders. All the templates are well organised with file names, folders and layer labels so they are easy to work with and customise, and are built with vector graphics so can be scaled to any resolution. The kit also includes 180 complimentary icons in PSD and Illustrator formats.

Origami

A design prototyping toolkit for Quartz Composer created by the Facebook design team. Origami provides a set of tools that makes Quartz Composer a lot more useable for making interaction prototypes, including switches, scrolling, bouncy animations, transitions, hit areas and loads more. Origami 2.0 was recently released which adds code export for iOS, Android and web, a presentation mode, Sketch integration and more. They have also introduced Origami Live, a companion app for iOS that lets you preview your interactive designs live on an iPhone or iPad.

iDraw

A powerful feature-packed vector design and illustration app for both OS X and iPad. Both versions of iDraw offer all the tools you'd expect from a decent Adobe Illustrator alternative, and they work together seamlessly through Handoff and iCloud Drive. It also has several features specifically for iOS developers including automated exports of @2x and @3x assets, Xcode integration that automatically exports assets into xcasset folders in your Xcode project and, best of all, Swift and Objective-C Core Graphics code export.

Affinity Designer

A powerful alternative to Adobe Illustrator for vector art and design. Affinity Designer is fully featured and focuses on speed and performance, built specifically for OS X. It provides a fully customisable, flexible workspace that supports iCloud, Full Screen and Spaces, and includes all the tools you'd expect. It also offers features specifically for iOS designers including @2x and @3x real-time export. Better still it's currently 20% off in the App Store to celebrate being App of The Year 2014 Runner-Up.

Spectrum

An OS X app for creating and managing beautiful colour schemes. Spectrum uses colour theory and harmony rules to make it easy to create aesthetically pleasing colour schemes by suggesting complementing shades and tints that go well with your existing swatches. It can also automatically generate colour schemes from images and lets you capture colours from your screen using the built-in colour picker. Unfortunately it cannot export to UIColor or NSColor but it does support CSS, PNG, Photoshop and Illustrator. There is also an iOS version so you can create colour schemes on the go!

Sketch UIColor Category Generator

A Sketch plugin that generates a Swift Extension or UIColor Objective-C category from your Sketch documents. A menu option automatically create a blank colour swatch sheet in Sketch that you can then add custom colours and names to. With a second menu option the plugin will ask you for a category prefix and generate the .m and .h files containing class methods for each of your custom colours with the names you provided. A very simple but handy plugin, especially if you already use Sketch to design your apps.

iOS 8 GUI PSD

A well organised, labeled and layered PSD of the iOS 8 GUI. The team at Teehan+Lax have released several versions of this iOS GUI PSD in the past, but this latest update includes all the major iOS 8 assets individually drawn as vector with a minimal amount of layers and shapes for easy editing. It also includes vector drawings of the iPhone 6 in Gold, Silver and Space Grey, along with both standard and zoomed views. The iOS 8 GUI PSD is a great tool for mocking up apps, concept ideas or create custom interface elements that work harmoniously with those native to iOS.

The Ultimate Guide To iPhone Resolutions

The debate as to whether fragmentation is becoming a problem on iOS is raging on, but I will certainly admit that I find it difficult to keep track of all the different screen resolutions. Thankfully, the people behind PaintCode have created a very handy guide that makes it a lot easier. The guide covers every device from the original iPhone to the new iPhone 6 Plus detailing points in coordinate space, rendered pixel resolutions, downsampling/upsampling scales and physical device sizes with pixel density. They've even included details of Display Zoom on the iPhone 6 and 6 Plus.

Composite

A clever iPhone app that turns your Photoshop Layer Comps into interactive prototypes. Composite automatically connects to your Photoshop documents and creates screens and interactions without having to export any images. By naming your Layer Comps in a certain way you can add tapzones and native transitions between screens with specific animations. You can also make certain elements stay fixed for realistic scrolling - perfect for navigation bars and toolbars. Finally, you can use Real-time Preview to get live updates of your work on the device while you're designing and tweaking in Photoshop.

LiveView

A free remote screen viewing application that allows you to stream part of your Mac's screen to an iOS device. LiveView is really useful for previewing interface designs or running simple simulations or demos. Unlike similar applications, LiveView will stream any section of your screen so doesn't require compatibility with any other specific design apps and you can connect multiple iOS devices at once. Tip: Hide LiveView on your Mac (Command + H) and it will continue broadcasting while hidden.

InVision

A free web and mobile prototyping and UI mockup tool. InVision is a powerful tool that lets you transform your designs into interactive prototypes complete with gestures, transitions & animations. You can then share designs with a link or a real-time presentation. Stakeholders can leave comments and feedback on the design which can be automatically turned into actionable to-do lists. There is also built in version control and sync for all your design files so you can see your designs has evolved or revert to previous versions.

Dotted Wireframe Papers

A free PDF that you can download and print to help you design your iOS apps. The PDFs are simple dotted papers with wireframe outlines of iPhone and iPad with additional handy markers for standard measurements and UI elements. A simple idea, but really useful for sketching new ideas, and it's free!

DevRocket

A Photoshop panel plugin that can help speed up the iOS graphic design workflow. DevRocket includes a collection of useful features including instant view templates for quickly getting started with your iOS designs, a smart icon workflow to help you create all the right sizes for all devices, native look previews so you can see how your designs will look on the actual devices, and one click export to generate all the artwork you need in retina and non-retina sizes.

xScope 4

The Iconfactory has now released xScope 4 that includes dozens of news features. On top of the eight original tools, xScope 4 now includes Mirror to generate views of an app icon or wallpaper for on iOS or over AirPlay; powerful text tools for searching, reformating and converting; a de-retinizer and loads of other features and enhancements. xScope will help any designer or developer do their job faster and produce more accurate results.

Skala Color

Probably the last colour picker you'll need. Skala Color is a feature-rich OS X color picker that gives you hue and opacity sliders to let you quickly target rough values, then fine tune with 4? the precision. Once you've picked the colour, you can copy it to the clipboard in one of several formats - Hex, CSS RGBA, CSS HSLA, UIColor, NSColor and more. It also automatically recognises colours copied to the clipboard, presenting them as a swatch that can be applied with a single click.

SketchTool

A free command-line app by Bohemian Coding - the people behind Sketch 3 - for exporting pages and slices out of Sketch documents. You can use the tool to list Sketch pages and artboards and export them in various formats. By default the tool will use the export options specified in the file, but you can alternatively pass options to export in a different format or scale.

PaintCode 2

A vector drawing Mac app that generates Objective-C code in real time. Great for keeping app bundle sizes down by using drawing code rather than images. PaintCode 2 has just been released which adds StyleKits - special Objective-C classes that bundle all your PaintCode design assets in a single package, and custom variables & expressions that allow you to change how your assets are drawn in code.

iOS Hat

A Photoshop plugin that knows how to write Objective-C! iOS Hat will generate custom drawing code from bézier shape paths like PaintCode but can also create code for UILabels, UIButtons and more from text layers and background colors. You can also use it to export assets for retina and non-retina devices or generate Auto Layout code to create layouts that look just like your designs.

ColorSnapper

An easy-to-use colour picker for quickly finding out the color of any pixel on the screen. ColorSnapper is activated via a system-wide hotkey, giving you a magnifying loupe to easily pick the pixel you need. The resulting color is copied to clipboard in a format of your preference. Works just like Sip, except you can keep the ⌥ key pressed to paste the colour in a alternative format.

Blueprint

An iPad app for building iOS mockups. Blueprint gives you the ability to create interactive iOS app mockups on the iPad using customisable drag-and-drop widgets for nearly all iOS interface elements. You can also sketch freely in the app or add custom images, actions or transitions to create realistic looking prototypes. You can export your projects in various formats or use the seperate viewer app to preview mockups on any iPhone or iPad.

Flinto

A really easy to use and effective service for creating iOS and Android prototypes. The interface is really fast and simple to use with lots of drag-and-drop elements and options for transitions and animations. Scrolling in the completed prototypes feels really natural and you can even fix headers and footers for navigation bars, tab bars and toolbars. Flinto isn't cheap at $20/month but you can try it for free for 30 days.

Bjango Photoshop Actions & Workflows

A collection of extremely useful Photoshop actions and workflows for app designers from the guys at Bjango. The collection includes everything you can think of to help you with icons, image sizes, colour profiles, text antialiasing and loads more. The collection is updated whenever they add more and they are also hosted on GitHub for you to fork.

Antetype

A fully featured prototyping tool for Mac for designing UIs for mobile apps and websites. Antetype uses a widget system that allows you to create and reuse UI components with multiple states that can be nested and laid out automatically in your UI design. It comes with a large library of ready-to-use widgets for iOS 7 and other platforms and you can export your designs as pixel or vector based graphics or preview them on the web.

Acorn 4

An affordable alternative to Adobe Photoshop, Acorn 4 is an award-winning fully-featured image editor. It includes many of the essential and pro features such as curves, non-destructive filters, layer styles, vector tools, layer masks and loads more. It's intuitive, super speedy and, best of all, a fraction of the price of Photoshop.

Subtle Patterns

Although the days of skeuomorphic interfaces are behind us, a well placed texture can still make an app look great. Subtle Patterns is a collection of over 300 free, high quality, tilable textured patterns that are subtle enough that they won't look out of place on iOS 7. Many of the textures are available to download in @2x resolutions as well or the free Photoshop plugin gives you access to the patterns directly in Photoshop.

Fluid UI

Online prototyping tool for designing mobile apps. You can drag and drop UI elements from a iOS, Android, Windows 8 and wireframe libraries or upload images for custom interfaces. Then add touch gestures and screen animations to bring your prototype to live before testing it on a device or sharing with your team. You can get started for free or sign up for one of the paid plans.

Sip

A simple but invaluable menubar app that instantly samples & encodes any colour on your screen. A quick keyboard shortcut will give you a system wide colour picker that lets you select any pixel on your screen. You can then paste the selected colour directly into your editor in one of several formats including CSS, NSColor, UIColor and CGColor.

POP - Prototyping on Paper

A simple iOS and Android app that allows you to bring you paper prototypes to life. You just take photos of your paper mockups and add interactions to simulate your interface. Perfect if you use a notepad like this one.

Developer Color Picker

A custom colour picker for developers that makes getting colours out of Photoshop/Acorn mock-ups quick and easy. Once you've picked your colour you can copy it you the clipboard in NSColor, UIColor, CGColorRef, CSS or HTML styles, with an optional declaration as well. Simple but extremely useful, especially because it is system wide.

AppCooker

A handy iPad app which allows you to quickly mockup app concepts and export to various formats. Also includes a useful iOS pricing tool and an App Store assistant.

Briefs

A feature-packed Mac app for creating mobile app prototypes and demos. It allows you to combine images and interaction across multiple screens to articulate the essential function of an app.

The iOS Design Cheat Sheet

A collection of useful data about iOS devices and things you have to keep in mind when designing something for iOS by Ivo Mynttinen. It includes screen resolutions, app icons, user interface elements, typography and more.

LittleIpsum

A simple Mac menu bar lorem ipsum text generator. Generates anywhere between 1 word and 4 paragraphs of lorem ipsum and copies it to the clipboard.

lorempixel

Like lorem ipsum of images. A tiny service for creating placeholder images of various dimensions and categories.

Skala Preview

A Mac app with companion iOS app that sends lossless, colour accurate image previews to any iOS or Android device. Images are sent in realtime so you can preview your designs on your device while you edit.