Keycap, a typing trainer that studies your weak keys

Field notes

Keycap adapts practice from an Error Profile that records missed keys and pairs after each run, removing corrected keys from later drills. Its learning path contains thirteen levels gated by accuracy, while separate challenge modes cover speed, accuracy, rare words, and five-minute fatigue practice. The page says passages can be written locally with Apple Intelligence or drawn from the app’s own Corpus, and that typed text is not retained after a run.