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.