There are many iOS prototyping tools out there: Briefs 2, POP, Prototypr just to name a few. The one that really struck me as the most efficient is Flinto by far. Ironically, it’s the only Web-based tool amongst them. And there is nothing better out there. It will literally take minutes to create a prototype that looks like it was made using Xcode Storyboard. Check out the Heyzap Prototype made in
![Quick iOS Prototyping In Flinto | Meng To - UI/UX Designer](https://cdn-ak-scissors.b.st-hatena.com/image/square/e77a15a52e10833d3c8d38039d5208cf3fa4ad60/height=288;version=1;width=512/http%3A%2F%2Fblog.mengto.com%2Fwp-content%2Fuploads%2F2013%2F05%2Fintro-600x422.png)