Apple silicon · macOS 14+. The build is ad-hoc signed — on first launch, right-click the app and choose Open.
Two new evidence-based practice modes.
Timing Trainer — lock your playing to the click. Pick a subdivision (quarters → 16ths); after each bar it scores your timing consistency — the tightness that separates pros from beginners — and shows whether you're rushing or dragging. Feedback comes after each rep (not a distracting live needle), and the tempo only rises once you've locked a couple of clean reps.
Technique Trainer — chromatic "spider" patterns and arpeggios, scored on smoothness (evenness) rather than raw speed. Safety-first by design: it cues a relaxed, light-pressure hand, nudges you to take breaks, and encourages varying your drills — the practice habits research links to lower injury risk. Weak-finger patterns are included, with honest expectations about how they progress.
History, rebuilt. Every mode now shares a consistent Progress chart (choose the metric, axis and scale) and a real Mastery breakdown. A new Adaptive focus panel shows exactly which items the spaced-repetition engine will drill next, alongside plain-language Suggestions for where to improve.
Calibration moved to Preferences (⌘,) ▸ Detection — it's a setup tool, so it now lives with the other settings instead of the main mode grid.
Plus a round of detection and stability fixes, including a steadier menu-bar mic indicator.