I'd like to compliment the Proto team on their bold decision and big achievement, to prove that a set of tools alongside an application are a thing of the past.
I've been showing Proto to dozens of designers, and they all drop their jaws when they see how the gestures work. They expect some adapted iOS pinch and two-or-more finger swipes (which they never really understood or memorized), until they see how a simple single finger gesture yields a complex page in seconds. Their smile is priceless, worth much more than 8 Euro's...
You struck gold !
Usually we get complaint or questions like those forum. Your compliment is encourage team and motivate higher to build better application for customer!
I really appriciated!