PianoMeter – Piano Tuner
PianoMeter – Piano Tuner Summary
PianoMeter – Piano Tuner is a with in-app purchases iOS app in Music And Audio by Willey Piano. Released in Aug 2020 (5 years ago). It has 51 ratings with a 4.51★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 234 monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Dec 21, 2025, version 36.
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Data tracking: SDKs and third-party integrations were last analyzed on Jan 24, 2026.
Store info: Last updated on App Store on Dec 21, 2025 (version 36).
PianoMeter – Piano Tuner was last scanned for SDKs 2026-01-24. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
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Google
Firebase4.51★
Ratings: 51
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App Description
PianoMeter is a piano tuning app that will transform your iPhone or iPad into a professional quality electronic tuning aid.
NOTE
The "free" version of this app is primarily for evaluation, and it only allows you to tune notes on the piano between C3 and C5. To tune the entire piano you will need to buy an upgrade through an in-app purchase.
What makes PianoMeter unique:
Unlike regular chromatic tuning apps that simply tune to a pre-calculated equal temperament, PianoMeter actively measures the tonal characteristics of each note and automatically calculates the ideal “stretch” or offset from equal temperament. In other words, it creates a custom tuning for each piano with the best compromise between intervals like fifths, fourths, octaves, and twelfths, the way aural piano tuners do when fine-tuning.
Functionality and pricing:
There are three levels of functionality: a free (evaluation) version, a paid "plus" version with basic tuning functionality, and a "professional" version with features geared towards professional piano tuners. The extra functionality is unlocked through one-time in-app purchases.
The Free version includes the following limited functionality:
• Tuning functionality for the mid-range of the piano only
• Automatic note detection
• Ability to measure each note on the piano to see how its current tuning compares to the ideal tuning curve (see if a piano is roughly in tune)
• Swipe in the graphing area to show a live frequency spectrum or the inharmonicity of measured notes.
Upgrading to "Plus" adds the following functionality:
• Tuning functionality for the entire piano
• Tune to frequency standards other than A=440
• Tune to historical or custom temperaments
• Calibrate device to an external frequency source
Upgrading to Professional unlocks all features of the "Plus" version, plus the following:
• Save and load tuning files, so a piano doesn't need to be re-measured each time it is tuned
• Pitch raise mode that calculates overpull for an initial first pass "rough" tuning (for pianos that are extremely flat)
• Custom tuning styles: create a custom tuning curve by adjusting interval weighting and stretch
• Multi-partial tone generator that plays the target frequencies
• New colorful "Tonal Energy" display that shows a brief history of