OneOctave – Play-Along Piano

Highlights

Cover as few as 3 keys — OneOctave performs every note outside your window, so even hard pieces are within reach on day one.
Falling notes show exactly what to play; anything you don't cover, the app plays for you, so the music always sounds complete.
Three ways to play — Listen (watch it perform), Play (perform in time), and Learn (the song waits for each note).
Import any MIDI (.mid) file and play along — it's saved to your library so it's never lost. Grow from 3 keys to 5, 1 octave, or 2.
Build your own song in the MIDI editor: tap notes onto the timeline, preview, and save. Slow the tempo or transpose to your range.

Works fully offline — no account, no internet connection. Nothing you play or create ever leaves your iPhone. Bundled beginner tunes and warm-ups get you started right away.
No tracking. No analytics. Data Not Collected. Interface in English, Korean, Japanese, Simplified Chinese, Traditional Chinese, and Spanish.

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