30 reviews
Content rating
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About this app

A-Tuner is a chromatic tuner corresponding to any instruments and boasting the highest level of accuracy among many similar applications.

Precise tuning in increments of 0.1 cents is possible with the strobe tuner like display.
It also has high precision pitch pipe (tuning fork) function which is convenient for training with tuning with ears.

We are planning to improve performance and expand functions in the future. Enjoy!

In addition to the features of the free edition (A-Tuner Lite), the following features are included.
・Note name notations (English, German, Dutch, French, Italian)
・Pitch selection mode (automatic / manual)
・Simple metronome
・Classical temperaments
 - Pythagorean temperament
 - 1/4 comma meantone
 - Pure intonation (major / minor)
 - Werckmeister III / IV / Ⅴ
 - Young Ⅰ / Ⅱ
 - Kirnberger I / II / III
 - Vallotti
 - Kellner
Updated on
Mar 23, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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30 reviews
A Google user
January 7, 2020
I've used some version of this app on my desktop, laptops, tablet, and phone. The pay version is worth the price because of the features. I like this because it's simpler to choose the note you want. I am a bassist. I also play guitar, violin, and banjo. This will work with all of them! You should remember that it's not plugged in so you need a quiet place. I use an electronic tuner on stage so I can plug in. I don't think this has option to plug in. Hint!
7 people found this review helpful
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Brandon Downs
April 3, 2022
I am a practioner of sound healing. I use this to see what frequency or key my Tibetan Bowls are in, as well as checking the accuracy of certain sound healing tracks (for example, a YouTube track that claims to be 432hz can be played and this app will verify or falsify the video's Hz claim). Very useful and very accurate, thank you!
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Gray Dawson
November 7, 2022
It was A-Tuner however great this app is its not what I was looking for as I'm looking for a tuner that will tune down half step , Full Step and also with option of tuning a 12 string...
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What's new

Version 2.3
* Setting dialogs can now be opened by tapping the indicator at the top of the screen.
* Negative transposition settings added for instruments in the lower and middle registers. (Paid version)
Version 2.2
* Improved volume control of tuning fork and metronome. (Paid version)
* Added "25 cents" and "50 cents" to allowable pitch error setting
* Added "Very slow (40%)" and "Super slow (20%)" to rotor speed setting
* Fixed issue where changing theme didn't take effect immediately