Save your typed notes with AB3 presets?
iOS kind of resembles a hardware studio, in that it can take some effort to recall a setup of all the separate apps, and get everything sounding like it did. The AB state saving is great, but not every app implements it, and you might use some actual hardware too. It would be great to be able to save some notes with an AB3 preset, to help jog your memory, how to get something back.
Even with state saving, you might not remember how you were playing the instruments, or if you had some specific moves with knobs that were part of the sound/song, or the key or chords, lyrics, etc.