Briefs is the essential app design tool built for a professional design workflow. Lifeless mockups don't tell the entire story, but you don't have time to build a prototype. We've been there, too. Your clients needed a clearer picture, so give them something to touch.
With Briefs, you can deliver iterations of your design that people can play with on their phone and start giving you feedback. Before you know it, you've cut months of back and forth from your schedule without a dime of development. Powerful enough for you?