# MultiTuneKeys - Piano Tunings > A piano keyboard with 7 tuning systems — Just, Pythagorean, custom & more. Canonical page: [https://chrome-stats.com/d/com.obbliworks.multitunekeys](https://chrome-stats.com/d/com.obbliworks.multitunekeys) ## Overview - **ID:** `com.obbliworks.multitunekeys` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** obbliworks - **Category:** MUSIC\_AND\_AUDIO - **Downloads:** 35 - **Version:** 1.2 - **Last updated:** 2026-07-26 - **First published:** 2026-06-13 - **Publisher country:** JP - **Size:** 32 MB - **Data as of:** 2026-09-20 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.obbliworks.multitunekeys) - **Website:** [https://obbliworks.com/](https://obbliworks.com/) - **Privacy policy:** [https://obbliworks.com/multitunekeys/privacy.html](https://obbliworks.com/multitunekeys/privacy.html) ## Description MultiTuneKeys — Multi-Temperament Piano Keyboard

A piano keyboard app you can play with a touch. Enjoy it casually, or switch between 7 different tuning systems to hear the differences.

Note: This app does not include piano sound. To make tuning differences clearly audible, it uses 4 simple waveforms (sine, triangle, square, sawtooth — sine and triangle include harmonics control).

Whether you want to play casually in equal temperament, or explore historical tunings like Just Intonation or Pythagorean — from a curious starting point to deep musical study, all in one app.

■ 7 Temperaments
• Equal Temperament (12-TET)
• Just Intonation
• Pythagorean
• 1/4-comma Meantone
• Werckmeister III
• Kirnberger III
• Custom Tuning — fine-tune each note in 1-cent steps within a ±100 cent range

■ Custom Tuning Editor
• 12 vertical sliders aligned with the keyboard
• Set a base note and tune intervals by ear
• Save up to 3 user presets
• Templates: load Just, Pythagorean, Meantone, Werckmeister, or Kirnberger as a starting point
• Real-time audio feedback while adjusting (held notes follow slider changes)

■ HOLD (Sustain) — perfect for pitch reference
• Sustained notes keep ringing after you lift your finger
• Tap a held key again to release just that note
• Great for practicing intonation against a chosen tuning while playing your own instrument

■ Anchor Mode
• A=440 (default): keep A fixed at the reference pitch — historically authentic, ensemble-friendly
• Tonic: keep the tonic at its equal-tempered pitch and let A drift — useful for comparing the same tonic across different tunings

■ Performance Features
• Pitch bend wheel with adjustable range (±1 to ±12 semitones)
• 4 waveforms: Sine, Triangle, Square, Sawtooth
• Harmonics control for Sine and Triangle
• Adjustable master volume
• Reference pitch: A=415 / 432 / 440 / 441 / 442 / 443 Hz or custom
• Haptic feedback on key press
• Loudness curve adjustment per waveform

■ For Musicians & Educators
• Hear the difference between tuning systems instantly
• Perfect for teaching music theory and acoustics
• Compare pure intervals in Just Intonation with Equal Temperament
• Explore historical temperaments used in Baroque and Renaissance music

Banner ads are shown by default. Remove them with a one-time in-app purchase. ## Rankings - #2,406,711 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.gms.permission.AD_ID` - `com.obbliworks.multitunekeys.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [OrganTuningTools](https://chrome-stats.com/d/com.organtuningtools) — 16 users - [Tune!It](https://chrome-stats.com/d/com.tuneit.tuneit) — 2,615 users, 4.67 / 5 - [Tunekeys: Real Piano & Lessons](https://chrome-stats.com/d/com.tunekeys.piano.keyboard.learn) — 14,389 users - [PianoMeter – Piano Tuner](https://chrome-stats.com/d/com.willeypianotuning.toneanalyzer) — 484,821 users, 3.92 / 5 - [OmniTuneX Pro](https://chrome-stats.com/d/com.omnitunex.pro) — 44 users - [Entonal Tuner](https://chrome-stats.com/d/com.nodeaudio.entonaltuner) — 3,626 users, 3.14 / 5 - [Pentatone](https://chrome-stats.com/d/com.arithmophone.pentatone) — 48 users - [Ultimate Tuner Pro](https://chrome-stats.com/d/qap.quintessenceaudio.ultimatetunerpro) — 56 users - [Ultimate Tuner Pro](https://chrome-stats.com/d/com.quintessenceaudio.ultimatetunerpro) — 2,519 users - [Temperament Piano Pro](https://chrome-stats.com/d/com.MusicalSoundLab.TempPiano) — 259 users - [Piano Tuner](https://chrome-stats.com/d/com.pianotuner.ai) — 564 users - [BeatTune - Tuner and Metronome](https://chrome-stats.com/d/tuner.metronome.afinador.guitar.bass.violin.ukelele) — 2,679 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.obbliworks.multitunekeys)