36 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
Feb 29, 2024

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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Ratings and reviews

35 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!
14 people found this review helpful
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Richard Scholtz
April 15, 2023
This is an excellent tuner. The display is clear, accurate and easy to read. I have used many tuners over my 50 years of playing and performing. I use it for tuning a wire strung harp. The adjustments of the "in tune" range to .5 cents that is available in the paid version are very useful. I also appreciate that the display changes color when a string is within the range. I will definitely recommend it to other musicians
11 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!
8 people found this review helpful
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What's new

* Fixed problem of detecting notes higher than the pitch range setting
* Fixed accuracy issues when used with some instruments
* Improved Concert Pitch to include two decimal places
* Improved signal level calculation algorithm
* Improved accuracy of pitch determination at low volume
* Octave Stretch function added. (paid version only)
* Improved accuracy in lowest and highest octaves
* Improved signal level calculation algorithm