Tuner

Michael Moessner

About this app

Tuner app for tuning musical instruments with features like:
* Detect pitch based on autocorrelation and FFT spectrum.
* Accuracy improvement by evaluating the spectrum phase information and polynomial fitting.
* Show how pitch changes over time.
* Basic instrument database (chromatic, guitar, bass, violin, ...)
* Support for custom instruments
* Several temperaments like equal, just, Werckmeister, Kirnberger, ...
* Non-12-tone temperaments (EDO 17, 19, ..., 41, 53)
* Scientific settings like FFT window size, FFT window type, overlap and more.
* Open source (https://github.com/thetwom/Tuner)
* Report bugs under https://github.com/thetwom/Tuner/issues

Ratings and reviews

absolutely brilliant tuner! I discovered this just last night. I used the pro version of Datuner for years but the version I have been using does not work on Android 16. found several others including the Peterson strobe which I was looking at purchasing. But I found this one before I purchased anything! beautiful clean interface, open source/free, super accurate, and no ads. thank you so much to the Dev for sharing!

Tuner is an excellent app for keeping instruments perfectly in tune. It’s fast, precise, and incredibly easy to use. The interface is clean, the pitch detection is reliable, and it works great whether I’m tuning guitar, ukulele, or anything else. No unnecessary features — just a solid, accurate tuner that does its job flawlessly. A well‑deserved 5 stars.

I like that it allows for microtonal tunings. Very useful. But I would like to be able to make the display look different: the area that tracks the pitch could be bigger (whole screen, not half), with smaller spacing between notes, so that more notes could fit on screen, that would be more useful for tracking pitch when singing.

What’s new

v9.1.1:
- Fix scrolling to correct note in strings view when in chromatic mode.