It's easy to trace the flow of a many-screen app with all of its transitions and interactions. Is intuitive, remembering animations on objects and applying the same animations on similar objects on other screens. 3D transformations. Transition tags allow animations to be reused across screens Uses artboards like Sketch Built-in gestures: Tap, double tap, long tap, swipe, touch down

I like is the Transition Designer. It gives you a lot of possibility and flexibility of using different transitions. Moreover you create nice prototypes in almost no time.

I like that is a prototyping tool with layers and has the ease of use like a presentation tool such as Keynote. I can also easily share prototypes with others.