Rapid Prototyping - With A Pencil
You don't need incredible design skills to build your app. If you can draw your ideas with a pencil and paper, you can design the next killer app.
No Learning Curve
Don't spend days and weeks learning the ins and outs of a design program. You already know how to draw. Iterate on your ideas quickly instead of googling how to make rounded corners in Photoshop.
Super Minimal Interface
You don't need all those bells and whistles of expensive design software to prototype your early stage ideas. No layers, paintbrushes, patterns, swatches, gradients, paths, transformations, and no learning shortcuts. Just a pencil, and some paper.
Offline support
No internet connection? No Problem. No electricity? No problem. You don't need to worry about being connected to the grid or even what percentage your battery is at. You can literally use these Sketchpads ANYWHERE.