This is great, Gabe.

One small piece of feedback: on my Pixel, the Android keyboard obscures the green button. So when I'm answering a numerical question, I use your number pad to enter the digits, and then use the enter key on my Android keyboard. This feels weird, but I guess with regular use it wouldn't.

A good project. It’s great that the tasks are generated deterministically, without using AI-generated answers

I made something similar for my partner a while ago for math drills but this is way better (and more comprehensive). I gave up after 3-5 modules. Kudos.

Dude, hell yeah! I was just shopping for this exact thing not that long ago [1]. I've never been great with math and wanted something I could practice with away from my laptop. Love that it works in the browser, too. Well done, this is really nice.

[1] https://graybearding.bearblog.dev/how-im-teaching-myself-mat...