AppMarketSpy › Music › PureTune Keys
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App info
- Developer
- Hiroto Okawa
- Category
- Music, Education
- Released
- Aug 29, 2026
- Version
- 1.0 (Aug 29, 2026)
- Price
- Free
- Size
- 10.4 MB
- Requires
- iOS 15.0
- Age rating
- 4+
- Languages
- English
In-app purchases
| Unlock All 12 Keys | $4.99 |
Current prices, App Store US.
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About PureTune Keys
PureTune Keys is a keyboard for playing and comparing equal temperament and just intonation. Hear the difference in intervals and chords directly on the on-screen keyboard. A supported wired USB MIDI keyboard can also be used. FEATURES • Switch between equal temperament and just intonation • Choose major or minor • Select a root key • Adjust the waveform, master pitch, and volume • Sustain notes after releasing the keys • Shift the keyboard octave • See active notes and tuning offsets • Stop every note instantly with the Off button The free version includes Root C. A one-time Pro purchase permanently unlocks the other 11 root keys. This is not a subscription. MIDI hardware is optional. Every feature can be reviewed with the on-screen keyboard.
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