Prototypes allows you to turn those designs into prototypes that you can interact with through the mouse on your Mac or by tapping on your iPhone. You simply draw and link hotspots and set animations, share your interface with other stakeholders, and get testing.
To get a feel for the output Prototypes creates before spending the cash, head over to ptyp.es on your iPhone, follow the instructions presented to you for installation, and enter the PIN 1234 5678. You’ll be able to try out a Prototypes-generated interface yourself.