About A-Tuner
A-Tuner is a full-featured, ad-free chromatic tuner for a wide range of instruments, from strings to winds. Its uncluttered display lets you focus on tuning and practice. Play a note and your device's microphone picks it...
A-Tuner is a full-featured, ad-free chromatic tuner for a wide range of instruments, from strings to winds. Its uncluttered display lets you focus on tuning and practice.
Play a note and your device's microphone picks it up. A rotating indicator and bar show whether the pitch is sharp or flat, while the note name, octave, frequency, and pitch deviation appear at a glance. Pitch deviation is displayed in 0.1-cent increments, helping you make fine adjustments with confidence.
The built-in tone generator can play the note of your choice, and the metronome is ready for everyday practice. You can also adjust the concert pitch, input sensitivity, in-tune tolerance, and display theme to suit your instrument and playing environment.
Key features:
• Pitch deviation displayed in 0.1-cent increments
• Clear visual guidance with a rotating indicator and bar
• Note name, octave, and frequency display
• Adjustable concert pitch
• Automatic or manual input sensitivity
• Transposition
• Automatic or manual note selection
• English, German, Dutch, French, and Italian note naming systems
• Octave stretch tuning for keyboard instruments
• Light and dark display themes
• Selectable reference tones
• Metronome
14 historical temperaments:
• Pythagorean
• Quarter-comma meantone
• Just intonation (major and minor)
• Werckmeister III, IV, and V
• Young I and II
• Kirnberger I, II, and III
• Vallotti
• Kellner
Use standard equal temperament or explore historical temperaments to find the sound that best suits your instrument and music.
Previous Versions
Here you can find the changelog of A-Tuner since it was posted on our website on 2019-10-25 12:41:19.
The latest version is 2.8.1 and it was updated on 2026-10-06 10:51:17. See below the changes in each version.
A-Tuner version 2.8.1
Updated At: 2026-09-25
Changes: v2.8.1
* Fixed incorrect intervals in the Pythagorean temperament.
v2.8.0
* Android 16 is now supported.
* Android 6.x is no longer supported.
* Improved stability when switching between apps.
v2.7.0
* Android 15 is now supported.
* Android 5.x is no longer supported.
v2.6.0
* Android 14 is now supported.
* Android 4.x is no longer supported.
v2.5.1
* Fixed an issue where notes above the configured pitch range were detected.
* Improved accuracy with some instruments.
A-Tuner version 2.8.0
Updated At: 2026-08-19
Changes: v2.8.0
* Android 16 is now supported.
* Android 6.x is no longer supported.
* Improved stability when switching between apps.
v2.7.0
* Android 15 is now supported.
* Android 5.x is no longer supported.
v2.6.0
* Android 14 is now supported.
* Android 4.x is no longer supported.
v2.5.1
* Fixed an issue where notes above the configured pitch range were detected.
* Improved accuracy with some instruments.
v2.5.0
* Improved the concert pitch setting to support two decimal places.
A-Tuner version 2.7.0
Updated At: 2025-09-11
Changes: v2.7.0
* Android 15 is now supported.
* Android 5.x is no longer supported.
v2.5.1
* Fixed problem of detecting notes higher than the pitch range setting
* Fixed accuracy issues when used with some instruments
v2.5.0
* Improved Concert Pitch to include two decimal places
A-Tuner version 2.6.0
Updated At: 2024-08-22
Changes: v2.6.0
* Android 14 is now supported.
* Android 4.x is no longer supported.
v2.5.1
* Fixed problem of detecting notes higher than the pitch range setting
* Fixed accuracy issues when used with some instruments
v2.5.0
* Improved Concert Pitch to include two decimal places
A-Tuner version 2.5.1
Updated At: 2024-02-29
Changes: v2.5.1
* Fixed problem of detecting notes higher than the pitch range setting
* Fixed accuracy issues when used with some instruments
v2.5.0
* Improved Concert Pitch to include two decimal places
v2.4.2
* Improved signal level calculation algorithm
v2.4.1
* Improved accuracy of pitch determination at low volume
v2.4.0
* Octave Stretch function added. (paid version only)
* Improved accuracy in lowest and highest octaves
* Improved signal level calculation algorithm
A-Tuner version 2.4.2
Updated At: 2024-01-31
Changes: v2.4.2
* Improved signal level calculation algorithm
v2.4.1
* Improved accuracy of pitch determination at low volume
v2.4.0
* Octave Stretch function added. (paid version only)
* Improved accuracy in lowest and highest octaves
* Improved signal level calculation algorithm
v2.3.2
* Compliance with EU General Data Protection Regulation (GDPR)
* Improved stability
A-Tuner version 2.4.0
Updated At: 2024-01-05
Changes: v2.4.0
* Octave Stretch function added. (paid version only)
* Improved accuracy in lowest and highest octaves
* Improved signal level calculation algorithm
v2.3.2
* Compliance with EU General Data Protection Regulation (GDPR)
* Improved stability
v2.3.1
* Android 13 is now supported.
* Android 4.4 and below are no longer supported.
A-Tuner version 2.3.1
Updated At: 2023-08-30
Changes: Version 2.3.1
* Android 13 is now supported.
* Android 4.4 and below are no longer supported.
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)
A-Tuner version 2.3.0
Updated At: 2022-03-23
Changes: 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
A-Tuner version 2.2.2
Updated At: 2022-01-21
Changes: Version 2.2.2 (Paid version only)
* Improved volume control of tuning fork and metronome.
Version 2.2.1
* 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
Disclaimer
Official Google Play Link
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