PianoMeter – Piano Tuner

PianoMeter – Piano Tuner

Professional piano tuning

42 ratings
47 reviews
Free
In-App Purchases

Details

Released
August 4, 2020
Updated
October 25, 2026

Features

PianoMeter – Piano Tuner screenshot #1 for iPhone
PianoMeter – Piano Tuner screenshot #2 for iPhone
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PianoMeter – Piano Tuner screenshot #6 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

3.3.0

October 25, 2026

• Pinch to zoom in on Peak View graph. • Peak View now shows a slower and more precise peak in grey. • The PTG Exam style now has more stretch in the bass instead of tuning pure 6:3 octaves. • Help -> About shows version number • Bug fixes

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Subscriptions & In-App Purchases

Pro 1-year subscription

Access to all Pro functions and settings

$59.991 Year
How to cancel PianoMeter subscription ⁉️

User reviews

Update to previous review

This app now has a “Peak View” which makes it much easier to visualize false beats and duplex/plate resonances in the high treble, like TuneLab. Seems like it used to be a feature only Pro users get but now it’s included for Plus. Definitely a step in the right direction and shows the developers are listening which is great. I find myself using this app more now. If they add the ability to zoom inside peak view, such that more resolution is visible in the range of +-10c like TuneLab, I will be using this app exclusively and be happy to spend the extra money on the Pro version. Keep up the good work!
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Response from developer

I will definitely consider that. One issue is that the "Peak View" resolution is fairly low, and raising the resolution would require slower measurements. It's a balance between showing updated "real time" pitch information vs. showing higher resolution with better-defined peaks.

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.

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.