Why I made Brainmill

I built a gym tracker for myself, and the rests between sets kept going wrong. I'd switch to another app to pass the time, lose sight of the rest timer, and look up three minutes later than I meant to. So I made some games that live inside the tracker itself. They're quick memory games that keep me busy and give my brain a workout while my body recovers, with the timer still on screen.

Each game is one short round that fits inside a rest, and each one gets harder as you get better. There are six so far: Digit Span, Reverse Span, Spot Check, Afterburn, Circuit and Twin Set. The same code also builds a standalone version, which is Brainmill. It's the same games without the gym, for anyone who wants a few seconds of brain training on their own. I plan to add more games over time, so if there's a kind of memory challenge you'd like to see, let me know.