# TuneLab Piano Tuner

> Professional piano tuning software measuring inharmonicity for custom tunings. (iPhone/iPad app by Real-Time Specialties.)

- Source: https://appshunter.io/ios/app/tunelab-piano-tuner/id335568329 (this page in markdown: same URL + `.md`)
- Developer: [Real-Time Specialties](https://appshunter.io/developer/335568332)
- Category: Music, Utilities
- Price: $299.99
- Rating: 4.80/5 from 91 App Store ratings · 48 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 13 MB
- Languages: American English
- Released: 2009-12-03
- Data updated: 2026-08-30
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/tunelab-piano-tuner/id335568329/reviews.md

## What is TuneLab Piano Tuner?

This app is for professional piano technicians. This is a professional tool that produces a custom piano tuning for any piano. It is part of the TuneLab line of piano tuning programs for smartphones, tablet computers and laptops that piano technicians have been using since 2001.

Notable features:

* Measures and uses inharmonicity of the piano to construct a custom tuning.
* Provides an over-pull mode for more accurate pitch-raises.
* Can store hundreds of tuning files for individual pianos.
* Tuning files can be stored locally and in the Cloud on Dropbox. 
* Provides many historical temperaments for period music.
* Switches notes automatically when you play the next note.
* Provides a strobe-like Phase Display for fine-tuning.
* Provides a versatile frequency spectrum display.

TuneLab lets you customize a tuning by sampling the inharmonicity for a few notes of the particular piano. You can choose the kind of tuning stretch you want by specifying different intervals for the bass, the treble, and the mid-range of the scale. These intervals can be octaves, 12ths, double octaves, etc. Good defaults are in place if you are not sure which settings you prefer.

After a custom tuning has been created from inharmonicity measurements you can store this tuning by name. The next time you need to tune that piano, or one very much like it, you simply load that same tuning file and start tuning. There is essentially no limit to the number of tuning files that you can store. TuneLab comes with some sample tuning files and an "Average" tuning file so you can start tuning right away without bothering to measure inharmonicity.

TuneLab covers the normal piano range from A0 to C8 (88 notes). The automatic note-switching feature makes it possible to enjoy hands-free operation. There is also easy one-touch manual note switching.

TuneLab has two different displays that are visible at the same time. One is the strobe-like Phase Display. This is a band where black squares move left or right depending on whether the note is sharp or flat. Tune the note to make the pattern stop moving. The other is the Spectrum Display. This is a graph of the frequency spectrum around the desired note that shows a peak in the audio frequency spectrum for every pitch present in the sound. The object in using this display is to tune the note until the peak in the graph is positioned at a central red line. The Spectrum Display makes it possible to do a rough pitch-raise without mutes since each string of a unison produces its own peak in the graph. Having both the Phase Display and the Spectrum Display visible at the same time gives you a more complete picture of the tuning than any single spinner-type or needle-type display.

## Key features

- Custom tuning based on inharmonicity
- Over-pull mode for pitch-raises
- Store hundreds of tuning files
- Cloud storage via Dropbox
- Historical temperaments
- Automatic note switching
- Strobe-like Phase Display
- Frequency spectrum display

## Recent user reviews (10 of 48)

All indexed reviews: https://appshunter.io/ios/app/tunelab-piano-tuner/id335568329/reviews.md

### 5/5 — Sheer joy to use

*2026-08-08*

I took up piano tuning with my local tuner 8 years ago and started the hard way; however excellent training. This app comes along and it optimises the tuning curve for you based on the inharmonicity readings. First he said my bass octaves were world class then he said the whole tuning of a Yamaha concert grand he’d restrung was amazing. Highly accurate, it is a joy to use. You can easily save files. Today I could microtune from 0.7c over, to 0.4c, my preferred area of 0-0.6c over. There is no tuner on earth who could differentiate between 0.3c over or under. This one does everything. Thoroughly professional it is a game-changer.

### 5/5 — Perfect app

*2024-01-26*

Perfect App for Piano Tunings. Also great support. I am using this app for years now and my tunings are much better than before.

### 3/5 — Okay but not my favorite

*2022-12-06*

Tune lab gets the job done with acceptable results. It is good to have as a back up and I really like being able to see the peaks for a pitch raise. I also own an Accu-tuner 4 and prefer using that over tune lab for fine tunings. The Accu-tuner beats tune lab every time on the quality of tuning and ease of use when fine tuning.

### 5/5 — Robert Treadway

*2022-11-07*

I've been using Tunelab for the IPhone for about two decades now and am very pleased with it. I have also used the more expensive programs out there and tho they are good they are not better quality.  Also, Tunelab has good support if you have any questions. Try that with Cybertuner(they want you to pay extra for any help). I recommend Tunelab over the others in price and equal quality of product.

### 5/5 — Fantastic

*2022-06-23*

I have been using TuneLab for over 5 years now. As a piano technician and tuner I highly recommend this app. It is simple to use and accurate as well as cheaper than many of the other professional piano tuning tools and/or software available.

### 1/5 — Yes it works but …

*2022-02-14*

Years ago, i would have rated this a 4 star. The app works, yes. The tunings are good, not great but certainly decent. But no improvements have been made in years! The app still looks like something from the seventies and most importantly, requires (Yes REQUIRES) a dropbox account for file sharing. After all these years milking for money, the author cannot be bothered to add icloud syncing (which is not difficult, being a software dev myself). I don’t always have an ipad available, being able to go between ipad and iphone is a must for me. No i don’t want bloatware dropbox on my iphone/ipad.

**Developer response:** The Dropbox app does not need to be installed to use the Dropbox functions in TuneLab.  The Dropbox functions in TuneLab (uploading and downloading) are self-contained within TuneLab.

### 2/5 — Charged wrong price!

*2021-03-31, version 4.4*

After much consideration and advice from colleagues, I opted to purchase Tunelab to assist my aural tunings with difficult temperaments and stretches.  Throwing down $299.99 isn’t an everyday thing for me.  You can imagine my frustration when instead of being charged the displayed $299.99, I was charged $320.99 instead!  Unfortunately this means that my initial experience has left a poor taste in my mouth.  I feel cheated.  I’d like a refund for the difference.

### 5/5 — Extremely Useful

*2021-03-26*

I started tuning my pianos a couple years ago  (m&h aa, yamaha c5) and this tool has helped me immensely!  Calculating the stretch and inharmonicity really helped me have a solid starting point to work from.  In addition the phase display has helped my aural tuning by providing visual feedback to what I hear.  
I'm not a pro and I'm sure I don't take advantage of all its features but as an amateur this too is indispensible! 
My pianos sound better than they ever had and I learned loads of great acoustic theory in the process.  Well done!

### 5/5 — A must have tool

*2021-01-29*

I have been a piano tuner for over 40 years. I started using Tune Lab 11 years ago and love it 
The most valuable thing about it is that I can tune even in extremely noisy locations with full confidence 
The most challenging situation involved tuning in a building full of noisy people. Pouring rain on a metal roof and concrete floor. The acoustics were so bad I couldn’t really even hear the piano. It would have been impossible to tune by ear but TuneLab saved the day. Thank you TuneLab

### 5/5 — Sheer joy to use

*2020-10-04, version 4.4*

I took up piano tuning with my local tuner 8 years ago and started the hard way; however excellent training. This app comes along and it optimises the tuning curve for you based on the inharmonicity readings. First he said my bass octaves were world class then he said the whole tuning of a Yamaha concert grand he’d restrung was amazing. Highly accurate, it is a joy to use. You can easily save files. Today I could microtune from 0.7c over, to 0.4c, my preferred area of 0-0.6c over. There is no tuner on earth who could differentiate between 0.3c over or under. This one does everything. Thoroughly professional it is a game-changer.

## Frequently asked questions about TuneLab Piano Tuner

### What does the TuneLab Piano Tuner app do?

This app is a professional tool designed to create custom piano tunings. It measures the inharmonicity of a specific piano to construct a unique tuning profile. It also offers features for pitch-raising, storing tuning files, and includes various historical temperaments for different musical periods.

### What are the key features of TuneLab Piano Tuner?

Key features include measuring and using a piano's inharmonicity for custom tunings, an over-pull mode for accurate pitch-raises, the ability to store hundreds of tuning files locally or in the cloud, support for historical temperaments, automatic note switching, a strobe-like Phase Display for fine-tuning, and a versatile frequency spectrum display.

### How much does TuneLab Piano Tuner cost?

The provided information indicates that this app is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, suggesting a one-time purchase model.

### What devices is TuneLab Piano Tuner compatible with?

The app is part of a line of piano tuning programs designed for smartphones, tablet computers, and laptops. It covers the normal piano range from A0 to C8, encompassing all 88 notes.

### Who is the target audience for this piano tuning app?

This app is specifically designed for professional piano technicians and tuners. Its advanced features and focus on custom tuning based on inharmonicity make it a tool for experienced individuals in the piano maintenance field.

## Version history (last 5 releases)

### 4.8 — 2026-08-25

1. Optional multi-partial Phase Display shows the Phase Display divided into up to four separate phase displays showing the tuning of four different partials.
2. More accurate inharmonicity measurement and inharmonicity model for new tuning files includes enhanced diagnostics at each measurement.
3. Tone generation mode now includes the option to generate all the partials combined rather than only the selected partial.
4. Tuning curve graph can also show a graph of projected inharmonicity for all 88 notes.

### 4.7.2 — 2024-08-16

1. Fixed a bug that can cause over-pull premeasuring to skip ahead and get out of sync with what notes you are playing.
2. Due to recurring problems with the new "auto-all" mode in automatic note switching, the automatic note switching code from version 4.6.1 replaced the new code.

### 4.7.1 — 2024-07-18

Fixed a bug so that prevented auto note switching from taking the offset into account.  In addition there are these changes from version 4.7:

* Adjustable update rate for the Spectrum Display - up to 10 updates per second.
* More reliable and sensitive Auto-All automatic note switching.
* Option to auto-note switch only on the attack portion of the sound rather than the sustain portion to reduce instances of switching to the wrong note.
* Phase Display speed is now a logarithmic function of the tuning error rather than linear. This gives more resolution very near to the tuning target plus more range when far from the tuning target.
* Faster and more precise Inharmonicity measurements (3 seconds max instead of 6 seconds max).
* Accuracy and speed of the Locking operation is improved.
* Removal of obsolete creation of "split-scale" tunings. Loading of previously saved "split-scale" tunings is still supported.
* Removal of obsolete manual adjustment of non 3-part tuning curves. Use 3-part tuning instead.

### 4.7 — 2024-07-15

* Adjustable update rate for the Spectrum Display - up to 10 updates per second.
* More reliable and sensitive Auto-All automatic note switching.
* Option to auto-note switch only on the attack portion of the sound rather than the sustain portion to reduce instances of switching to the wrong note.
* Phase Display speed is now a logarithmic function of the tuning error rather than linear. This gives more resolution very near to the tuning target plus more range when far from the tuning target.
* Faster and more precise Inharmonicity measurements (3 seconds max instead of 6 seconds max).
* Accuracy and speed of the Locking operation is improved.
* Removal of obsolete creation of "split-scale" tunings. Loading of previously saved "split-scale" tunings is still supported.
* Removal of obsolete manual adjustment of non 3-part tuning curves. Use 3-part tuning instead.

### 4.6.1 — 2022-11-06

In addition to support for system-wide Dark Mode, this update provides an option to override the system setting for Dark Mode within TuneLab.  The user may now choose to have Light Mode, Dark Mode, or to follow the device's light/dark setting.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*