# PianoMeter – Piano Tuner > Professional piano tuning Canonical page: [https://chrome-stats.com/d/id1515529208](https://chrome-stats.com/d/id1515529208) ## Overview - **ID:** `id1515529208` - **Platform:** Apple - **Type:** Apple app - **Status:** Available - **Publisher:** Willey Piano - **Category:** Music - **Rating:** 4.60 / 5 (41 ratings) - **Version:** 3.2.1 - **Last updated:** 2026-08-18 - **First published:** 2020-08-04 - **Size:** 30 MB - **Data as of:** 2026-09-07 - **Store listing:** [Apple App Store](https://apps.apple.com/us/app/pianometer-piano-tuner/id1515529208) - **Privacy policy:** [http://pianometer.com/privacy-policy](http://pianometer.com/privacy-policy) ## 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 the pitch • Access to all future features and enhancements Upgrade costs: Free to Plus (approximately US$30) Free to Pro (approximately US$350) Note about permissions This app requires permission to access the microphone on your device and permission to read and write files. ## Rankings - #188,533 — Overall ## Review summary User reviews generally praise PianoMeter for its professional-grade tuning tools, fast note responses, and especially its visual plotting that maps every note to the keyboard. The app is seen as a strong, reliable workflow for serious tuners, with a clean UI and useful features like pitch raise and on-the-fly curves. However, recurring caveats include accuracy issues in the bass/inharmonicity mapping, occasional unreliable readings, and some bugs after updates. Pricing and licensing for the pro features are debated. Many users value the app but note a learning curve. ### Pros - Strong visual plotting of notes aligned to a keyboard, giving clear, client-friendly feedback. - Professional-grade tuning with fast note response and adjustable tuning curves; features like pitch raise work well. - Clean, intuitive interface that is easy to learn with tutorials. - Works with the iPhone built-in microphone, allowing tuning without external hardware. - Widely used by professional piano tuners and supported by responsive developers with ongoing updates and features in paid versions. ### Cons - Bass and inharmonicity readings can be inaccurate, with notes like C1 reported as sharp and overall bass tuning not reliable. - Pricing for the pro features is high and some capabilities, like multiple profiles, are locked behind tiers. - Reliability concerns after updates, including occasional flicker/crashes and license issues during OS updates. - Occasional measurement quirks, such as partial slips, that require correction. - Learning curve and setup complexity; users often need tutorials and practice to achieve consistent results. ## Similar extensions and apps - [TuneLab Piano Tuner](https://chrome-stats.com/d/id335568329) — 4.80 / 5 - [PiaTune](https://chrome-stats.com/d/id1441771210) — 4.40 / 5 - [pianoscope – Piano Tuner](https://chrome-stats.com/d/id1529249459) — 4.70 / 5 - [Ivory Pro: Piano Tuner Pro](https://chrome-stats.com/d/id6770356763) — 5.00 / 5 - [Piano Tuner(Pro Edition)](https://chrome-stats.com/d/id1195414686) — 2.40 / 5 - [Tuner by Piascore](https://chrome-stats.com/d/id635644097) — 4.80 / 5 - [Piano Tuner Pro - Multi-String](https://chrome-stats.com/d/id6782347453) — 3.00 / 5 - [Piano Prober](https://chrome-stats.com/d/id1209745376) - [Piano Tuner(Home Edition)](https://chrome-stats.com/d/id1209825228) — 1.70 / 5 - [Tuner Lite by Piascore](https://chrome-stats.com/d/id635828559) — 4.50 / 5 - [Touch Tuner](https://chrome-stats.com/d/id714823553) — 4.10 / 5 - [OnlyPure Piano Tuner](https://chrome-stats.com/d/id1635946378) — 4.50 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/id1515529208)