I recently tried Prototyping on Paper (POP) while designing a simple iOS/Android application named ‘Piglet’. POP is a an iOS and Android application intended to quickly prototype the look and feel of a mobile application. The concept is simple – you hand draw the layout for each screen, use POP to take a photo of each screen, and then link hot spots on each screen to other screens to simulate the interactive navigation for the application.
The project view (below left) shows each of the screens that have been captured by the camera. Note the controls on the bottom where you can take a photo, import from the photo gallery, ‘play’ the project interactively or share the project.
I spent most of my time drawing the screens to be photographed. It may actually be quicker to use a drawing tool to create the prototype screens, especially when multiple screens have a lot of content in common.