Quinterval is a circle of fifths that also shows all tones of the selected scale.

A scale in the circle can be selected by tapping on the tonic or by turning the controller in the middle. The names of the notes can be defined in the settings, for example english style with a B or german style with a h before the c.

The display at the bottom shows the related major scale with its key signature. The first step and the sixth step with the related minor scale are slightly highlighted. The notes can be displayed with G-Clef, C-Clef or F-Clef.

What’s New

Version 1.7.1

Notenames below the scale are not truncated with larger fonts
Last selected scale is saved again on exit

Ratings and Reviews

4.1 out of 5
8 Ratings

8 Ratings

Nate4129 ,


Support for tenor clef would be nice but other than that great app.

jlh16345 ,

Update created errors

Most recent update as introduced errors in the scales....not all notes are shown with the sharps of the key signature
Update: after providing the initial review the developer was quick to act on my comments and fix the errors!

Developer Response ,

Thank you for your feedback! The last update (V1.7.1) fixes a format issue that hopefully solves your problem. If not, please let me know!

Marichann ,

It doesn't work

I went to update the app and for the last few days it's just a gray box that says installing but nothing happens. I tried to delete the app but it won't work.


Oliver Hahn
8.5 MB

Requires iOS 11.4 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Spanish

Age Rating


  • Family Sharing

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

More By This Developer

You May Also Like