Good concept but TONS of bugs
Theoretically one of the best UIs for mobile prototyping, but beware - the app will go to hell after you start working with it. Continuous crashes, hangs, load-delays and bugs. And unfortunately the team is not responsive.
If u want to mock up 5 screens for fun, ok; but if you actually want to work - you will need to switch to Marvel, or Demonstrate or any of the other dozen.
Too bad.
Joe6134 about
POP - Prototyping on Paper, v2.1.15