The calculator I always wanted

[vanLudwig]

The selection-based roll is obviously confusing a lot of people. I'll have to do something here. I think it works well once you understand it; do you agree? i.e. is the solution to better explain it, or should I change the interaction model?

I used to have a y^x button instead of ^. I couldn't decide whether it should use an italic serif font like all other math, or bold sans like all the other large buttons. Both looked awkward.

Sorry, I don't have a manual yet. It's on my to-do list.

Good catch on the algebra buttons going behind the camera cutout. I'll bet that's horrible on large notch phones like the Pixel 3.