Comp CC, which is now available for the iPad, ... Adobe’s New iPad App Lets Designers Quickly Sketch Out Layout Ideas On Mobile. Frederic Lardinois. 9:00 AM PDT · March 30, 2015.

Layout with text frames. Users are initially presented with a choice of 13 standard built-in comp sizes — but you can create your own custom sizes, too.

The iPad stencil kit is meticulously crafted to include all the essential elements needed for app design. It features standard menu buttons, icons, and other UI components, all at a 1:1 scale.

Jot down ideas: capture bursts of imagination from wherever you are. Replace the physical notebook with a digital one. FigJam for iPad, specifically, wants to make feedback more personal.