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A musical instrument tuner for Android.

<img src="" alt="Get it on F-Droid" height="80">

NOTE: Do not use the outdated Play Store version. The keystore file that was used to sign it has been lost, so updates can no longer be pushed to Google Play.



Run ./gradlew test to run all unit tests. In addition, there are UI tests based on image comparisons which can be run using ./gradlew connectedCheck. The reference images are generated using a Nexus 5X emulator (resolution: 1080 x 1920, 420 dpi) with API level 26.


The Tarsos DSP library ( is used for pitch detection.

Current library version: commit d958352


Cythara is licensed under GPLv3. A copy of the license is included in the LICENSE.


In chronological order:

Thank you all!


Listening to input

Providing feedback

Listing tunings

Listing frequencies

Listing notations