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A super simple online tool for generating app icon images iOS and Android. App Iconizer lets you drag in a square image up to 1024 pixels and 10MB, and it'll convert the image to a folder of PNGs ready to be used in your app. You can download the icons for iOS or Android (round or square). That's it! Quick, simple and free.
A Mac app for quickly creating good looking App Store screenshots. Screenshot Designer lets you choose from over 130 ready to use templates for iPhone, iPad and Mac, which you can customise with your own images and text. There are options to tweak the device image including model, scale, and shadow, and change the text to use a custom font, colour, position, and shadow. Once you've got your screenshots looking just right, they can be exported as PNGs ready to be uploaded to iTunes Connect.
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.
A drop-in debugging library for iOS apps. DBDebugToolkit is simple to set up with just a single line of code. After setup, a shake of the device will present a menu with a huge array of debugging information. This includes everything from performance including realtime graphs of CPU and memory usage, user interface with options to show frames and slow down animations, to networking with a list of all requests sent by the application, and loads more. You can also set up other triggers if shake isn't right for your app.
A simple Mac app that quickly reformats JSON to be pretty printed making it more humanly readable. Formatter provides a convenient window to drop your JSON files and instantly reformat them. You can also drop your files on the Dock icon as well.It also includes an Xcode extension which you can enable in System Preferences. This gives a menu item in Xcode you can use to format JSON files you are looking at from inside your project. Finally, it also includes a Quick Look plugin that makes JSON files easier to read from the Finder.
A free set of user images that can be used in any personal or commercial projects. Diverse UI solves the problem of finding user images for your mockups and marketing by providing you with images that more accurately represent the diversity of your user base. You can download images in any size from 32px to 180px square and pick from neutral, female or male. They have also recently added a Sketch plugin that lets you quickly add diverse user images to your designs without having to leave Sketch.
A command line tool that helps find common xib and storyboard-related problems in your Xcode projects without running your app or writing unit tests. IBAnalyzer starts by parsing all .xib, .storyboard and .swift files in a folder and then uses this data to generate warnings. It can find unimplemented outlets and actions in classes, as well as @IBOutlets and @IBActions defined in code but not connected to from nibs. IBAnalyzer is open source and extensible so you can create new warnings by creating new types that conform to the Analyzer protocol.
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.
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.
A super simple Apple Watch app that lets you keep track of your app's App Store ranking from a complication on your watch face. RankWatch gives you an iPhone app to search for your app by name, country and category which is then visible on the Apple Watch. The complication shows the current ranking as well as how much is has increased or decreased by.
An online marketplace of ready-made animations that you can buy as GIFs to use in your prototypes or apps. Micro Animations provides each animation as a transparent GIF in light and dark themes along with the original Photoshop file for you to tweak. All GIF animations and PNG images are royalty-free, which means they can be used in your App Store apps. And if you can't find exactly what you're looking for you could at least use the library for a bit of inspiration.
A Mac app and platform that offers continuous localization for your Xcode projects. LocalizeWiz completely automates the localization workflow by monitoring strings files in your Xcode projects for changes, so any new content is automatically localized to all your supported locales, and changes synced back to your Xcode project. You get to localize up to 300 strings or 3 projects for free, with additional paid plans to remove restrictions and translate your app to over 50 different languages.
A remote logger for iOS and Android apps. Bugfender stores logs created by your app and sends them to their server, which you can then view in real time on the online console. You can set tags and levels for each line logged to later search and filter entries within the log viewer, and you can get information about the device for each logging session and review OS versions and device features. You can get started for free with unlimited app installs, app users and sessions, or sign up to a paid plan to remove logging restrictions.
An online tool for automatically converting Objective-C to Swift. Swiftify can convert everything from a small code snippet to an entire project, and supports most of the main features of both languages. They've also recently created an Xcode extension available on the Mac App Store that lets you convert Objective-C to Swift without even leaving Xcode. The generated code might not be guaranteed to be perfect but it could save you a lot of time when converting your projects. You can use the tool online for free with a few restrictions or pay an monthly or annual fee to unlock all the features.
An online collection of free, high quality animation files for the Lottie animation framework. LottieFiles lets designers and animators share their animations created in Adobe After Effects for developers you use in their iOS and Android apps. All animations can be previewed on the site before downloading the JSON file ready to be used by Lottie. Some are also supplied with the original AEP file so you tweak the animation and re-export for the exact effect you're looking for.
A library for iOS and Android from the developers at Airbnb that parses Adobe After Effects animations and renders the vector animations natively on mobile. Lottie can handle animations exported as JSON using the bodymovin plugin and as the animations are backed by JSON they can be complex without being huge in size. Best of all, as the animations are rendered as vectors they can be resized, looped, sped up, slowed down, and even interactively scrubbed without any loss in quality.
A powerful animation and prototyping application for Mac & iOS. Kite Compositor provides a full suite of powerful tools that let you build complex interfaces on a WYSIWYG canvas. You can create elaborate animations using the integrated smart timeline which allows you to drag and edit animation durations, keyframes and curves. You can also import your designs from Sketch as native Kite layers, and preview your designs on iOS with the companion app. They're even working on a KiteKit framework to embed and play .kite documents right from within your own iOS or macOS apps!
A simple online over-the-air app distribution service. BuildTry provides a super simple free alternative to the more complex distribution services such as TestFlight, Crashlytics, HockeyApp, etc. No need to manage user groups, or wait for processing, you just upload your IPA or APK and it gives you a link to share with your testers. Links expire after 15 days and allow 25 installations per app, and uploaded apps must be under 400MB.
A simple widget that helps convert your website visitors into App Store downloads. Textpuff lets your website visitors text themselves a smart download link from your website. Clicking the link takes them to either the App Store or Google Play Store based on the device they are using. From the TextPuff dashboard, you can track how many website visitors converted to app downloads, from where and how many times the links that are sent are clicked.