Quinterval

Name: Quinterval
Rating: 4.4 (21 reviews)
Author: Oliver Hahn

By: Oliver Hahn App

Circle of Fifths with Scales

Overview

Version:

2.4

Last updated: 2026-07-19

Ranking

#247,323 ▼ 92

Overall

Features & Capabilities

Quinterval is an interactive circle of fifths including the display of the corresponding scales.

A key in the circle can be selected either by touching the tonic or by turning the slider in the middle. The circle displays both the respective major and parallel minor scales. The display ranges from F-flat major (D-flat minor) to G-sharp major (E-sharp minor). A second slider can be used to move the visible circle section accordingly. The note names can be set between german, english or italian notation.

The lower area shows the related major scale with its key signature. The first step and the sixth step with the corresponding minor scale are highlighted. The notes can be displayed with G-Clef, C-Clef or F-Clef. The accidentals can also be displayed before the individual notes.

Additional functionality is available as an InApp purchase:

Display the notes of the parallel minor scale
Display triads with their chord names
Playback notes by tapping on them

User Growth & Download Statistics

App

By:

Oliver Hahn

Rating:

4.40

(21)

Version:

2.4 Last updated: 2026-07-19

Version code:

875605751

Creation date:

2010-05-26

Compatible devices:

Size:

42.77MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-09-03

Compare stats and ranking:

Ranking

# 247,323 ▼ 92

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Oliver Hahn

Apple Apps Store

https://apps.apple.com/us/app/quinterval/id373810100

Website:

https://www.aeon-square.com/en/quinterval.html

User Reviews

I wanted to use this to quickly see diatonic Chords . Please include the traditional Roman Numerals to the degree scale at the bottom . Please add Cflat Maj with its 7 flats . Please add Csharp Maj with its 7 sharps, even though it is rarely used.

by In*****, 2023-06-18

This is a great app, with clean UI, and good pricing for the full version. My only gripes are that you can’t do both options for accidentals placing(which could be solved by either making both options checkboxes, or adding a third option that is just “Both”), you can’t have multiple octave scales (which could be a box with the current number of octaves in the scale, and +/- buttons on either side. The scale could automatically resize itself to fit), and the lack of arpegios (which could just highlight the notes in the current scale with a different color if they are in the arpegio.) Thank you for reading my review, and I understand if difficult to implement features like multiple octave scales aren’t added, but simpler things would like my first and last idea would be greatly appreciated.