Kite is a native animation and prototyping design tool for the Mac. It features an intuitive timeline editor, WYSIWYG canvas, and a robust scripting interface. The iOS companion app, Kite Compositor for iOS, allows you to interact with your Kite designs right on your iPhone or iPad.
Flawless App is macOS development tool for an instant visual quality check of mobile apps. The tool spot visual bugs before they cost you money.