Memory tools work. Most of them are no fun.

Spaced repetition is one of the best-studied ideas in learning. It also has a quiet failure mode: people try it, see that it works, and quit anyway. A backlog of due cards is a to-do list, and to-do lists are easy to ignore.

Mochi started from a simple swap. What if the thing waiting for you wasn't a number, but a creature? Something that gets hungry when your reviews pile up, brightens when you clear them, and grows over weeks of showing up. The science underneath doesn't change — the reason to open the app does.

We're keeping it small and honest. No streaks-as-stress, no dark patterns, no selling your study habits to anyone. Just a calm daily loop that helps things stick, with a pet that's glad you came back.