No need to stick to 12 notes in an octave – quickly tune to any equal temperament!

EDO Tuner makes it easy to tune your instruments to ETs / TETs / EDOs outside of 12 from your device.

– Choose any equal temperament from 1 to 41
– Variable root frequency from C4 to C5 - 1
– Super smooth tuning experience. Tuner bar uses special algorithms to avoid jumping between harmonics and background noise while tuning your instrument
– Track your current frequency and error in cents

How to Use:
1) Set the "Number of Notes" to split each octave equally into that however many notes you like
2) Set the "Root Frequency" to change the frequency that all octaves are based on
3) Go ahead and play a note on your instrument! EDO Tuner will find the nearest note

In the tuner bar, the big number is the note number, the small number is the octave. For example, in 12 TET:
0 = C
1 = C#
2 = D
3 = D#

What’s New

Version 1.2

– Updated frequency display to be smoother

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

mysteriousme97 ,

Best tuner app I’ve ever used

It really gives me a smooth tuning experience. Works pretty well with my cello. And no annoying ads inside the app. A solid 5.

App Privacy

The developer, John Watson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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