[melloclello]

I once built a calculator app where you could two-finger swipe to undo/redo: https://appsto.re/nz/oxLx3.i

Previous/future states simply appear adjacent to one another so you can scroll through them easily.

I absolutely believe that version control history is something that needs to be treated as a dimension like any other

[deckar01]

I once built a motion controlled drawing app that mapped rotating hands to scrubbing through the undo/redo stack.

https://youtu.be/DM1JtYyr88k

Skip to 0:18 to skip calibration.

It would be cool to make a calculator that recognized number gestures.