What makes Keynote such a great prototyping tool?
No need to learn a complex design tool. You already know Keynote (and it's probably on your Mac or iPad already).
It supports all the fidelity you need without adding complexity to your worlflow.
Links, animation, actions, and transitions give you the power to interactively tell a story with your designs.
- OS X 10.7.4 or later
- Keynote '09 or later