PianoMeter – Piano Tuner

PianoMeter – Piano Tuner

Professional piano tuning

41 ratings
46 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • August 4, 2020
  • July 22, 2026

Features

PianoMeter – Piano Tuner screenshot #1 for iPhone
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About

This app transforms your device into a professional electronic tuning aid for pianos. It analyzes each note's tonal characteristics to calculate an ideal custom tuning, going beyond standard chromatic tuners. Different upgrade levels offer expanded functionality for both hobbyists and professionals.

Custom piano tuning calculation
Automatic note detection
Tonal characteristic measurement
Live frequency spectrum display
Inharmonicity measurement
Pitch raise mode
Multi-partial tone generator
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What's New in PianoMeter

3.2.0

July 22, 2026

• Cloud sync (Pro): keep tuning files in sync across your Apple devices via iCloud • Tuning history (Pro): automatic per-piano tuning records, with nearby-piano suggestions when opening files • Audio input channel selection with external-mic indicator • Peak View now included with Plus • Better battery life while tuning, plus many fixes

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Subscription plans

Pro 1-year subscription

Access to all Pro functions and settings

$59.991 Year
How to cancel PianoMeter subscription ⁉️
1

In-App Purchases

$314.99

Plus to Pro

Access to all pro functions and settings

User reviews

Anthony is Awesome!

I’ve been learning to tune pianos and the Piano Meter app has been a fundamental tool.

The biggest plus to this app is Anthony’s desire to continue to polishing it.

I used the pitch raise feature on a Kenabe pro upright, it was within 3 cents afterwards! The custom inharmonicity curves help the piano really sing. The app has made learning to tune fun and educational!
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Good app but UI is lacking

This app does an excellent job on tuning stretch but I find the UI very lacking. TuneLab has a simpler and clearer interface, and their spectrum view is especially helpful in the high treble where you can clearly distinguish false beats and duplex resonances. On this app, it’s good to have an overview of all the partials and what they are doing, but the app provides no reference to which partial it is currently tuning, and the needle and numbers swing so much they are practically useless for any sort of precision tuning. For example if it was tuning a 4:2 octave, I would like to know as to prioritize the 4th partial on account of others. The strobes are small and cluttered, making them hard to see when the phone is away on a bridge. I also wish their spectrum view is zoomed to the frequency range of the note being tuned, like TuneLab, rather than show the entire range of keyboard which in my opinion is useless. For an ETD, you have to rely on your ears a lot if you’re using this app, you might as well tune aurally.
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Great app

Original post: I've been turning my own Baldwin 5 foot 8 inch grand since the early 1970s. Using just a tuning fork. Neither the bass stretch of piano meter or piano scope is pleasing to me. I'm experimenting with tune lab trial version which gives much less stretch. But tune lab has other flaws which I'm trying to correct for. Using the pianometer app as reference– Full version. Update: at this point I'd say I prefer the stretch of pianometer, plus I don't have the patience to keep retuning the bass. I think my initial dissatisfaction was because the 1974 book I learned to tune by did not incorporate any stretch in its method, plus I was mostly playing Bach then which is confined to the middle 4 octaves . at the moment I'm only playing my own composition which uses octaves in the deepest bass. Now that I've gotten used to it it seems fine. So I've changed my rating to five stars. Makes the tuning process much simpler.
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Response from developer

Thank you for the feedback. Do you prefer having less bass stretch than PianoMeter is currently giving? If so, you might try creating your own tuning style or using the "Low stretch (PTG exam)" built-in style for your tuning. Please feel free to email me at support@pianometer.com if you have any questions or feedback.

Great app

I've been turning my own Baldwin 5 foot 8 inch grand since the early 1970s. Using just a tuning fork. Neither the bass stretch of piano meter or piano scope is pleasing to me. I'm experimenting with tune lab trial version which gives much less stretch. But tune lab has other flaws which I'm trying to correct for. Using the pianometer app as reference– Full version. Update: at this point I'd say I prefer the stretch of pianometer, plus I don't have the patience to keep retuning the bass. I think my initial dissatisfaction was because the 1974 book I learned to tune by did not incorporate any stretch in its method, plus I was mostly playing Bach then which is confined to the middle 4 octaves . at the moment I'm only playing my own composition which uses octaves in the deepest bass. Now that I've gotten used to it it seems fine. So I've changed my rating to five stars.
Show more

Response from developer

Thank you for the feedback. Do you prefer having less bass stretch than PianoMeter is currently giving? If so, you might try creating your own tuning style or using the "Low stretch (PTG exam)" built-in style for your tuning. Please feel free to email me at support@pianometer.com if you have any questions or feedback.

Outstanding App!

Best money I’ve ever spent on an app. Used the trial version to tune a couple of octaves then immediately upgraded l. First attempt tuning my piano myself (usual tuner has been unavailable for some time) and can’t believe the result. It takes patience and a bit longer than the pros, but I trusted the tuning curve the app churned out from the notes I played in and the results are fantastic! Probably won’t be paying a tuner again anytime soon thanks to this app!
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Developer apps

FAQ

What does PianoMeter do?

PianoMeter transforms your iPhone or iPad into a professional electronic tuning aid for pianos. It actively measures the tonal characteristics of each note to calculate an ideal custom tuning, going beyond standard equal temperament.

What are the different versions and their costs?

There is a free evaluation version with limited functionality. You can upgrade to 'Plus' for basic tuning of the entire piano (approx. US$30) or to 'Professional' for advanced features like saving tuning files and pitch raise mode (approx. US$350). These upgrades are one-time in-app purchases.

What features are available in the free version?

The free version allows tuning of mid-range piano notes, automatic note detection, and measuring notes to compare their current tuning to an ideal curve. It also offers a live frequency spectrum and inharmonicity display.

What are the benefits of upgrading to the Professional version?

The Professional version unlocks all 'Plus' features and adds the ability to save and load tuning files, a pitch raise mode for very flat pianos, custom tuning style creation, a multi-partial tone generator, and a 'Tonal Energy' display. It also includes access to future features.

What permissions does the app require?

This app requires permission to access your device's microphone for sound input and permission to read and write files, likely for saving tuning data and settings.