Proto.io is a new mobile prototyping tool specifically tailored for designing mobile application UI. The web based environment allows you to start off by creating a project for popular devices like iPhone, iPad, Android phones or tablets, as well as any device with a screen interface.
After creating a few screens, you would typically expect to be able to link pages together with interactivity – and proto.io does just that. It comes prepackaged with actions that are custom to hand held devices allowing you to simulate interactivity such as clicks, taps, tap & holds as well as swipes.
Gestures, touch events, screen transitions, and animations
Proto.io supports all the major mobile gestures and touch events like tap, tap-hold, swipe, pinch, and zoom. Interaction designers are not limited to a single ‘link’ transition anymore. Instead they can apply animated screen transitions like slide, fade, pop, flip, flow, and turn.
Further than that, they’re not limited to just screen transitions either. Users can also apply basic animations to any UI element in their prototype like move, fade, rotate, and scale. Best thing of all? It only takes a couple of minutes to create a fully functional prototype with interactive interfaces!