# Chord ProTrainer — Master the Circle of Fifths

> Interactive tool for mastering the Circle of Fifths and chord progressions. (iPhone/iPad app by THILO ANSELM VOISSEL.)

- Source: https://appshunter.io/ios/app/chord-protrainer/id6757499981 (this page in markdown: same URL + `.md`)
- Developer: [THILO ANSELM VOISSEL](https://appshunter.io/developer/1844378266)
- Category: Music, Education
- Price: $9.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-04-27
- Data updated: 2026-08-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chord-protrainer/id6757499981/reviews.md

## What is Chord ProTrainer?

Master the Circle of Fifths so you can improvise with confidence and recognize chord relationships instantly.

Practice in short, focused sessions with an intuitive flashcard system featuring 3 levels of difficulty …

Basic Mode:
Learn where every key sits on the Circle of Fifths
(dominants, subdominants, and relative keys)

Advanced Mode:
Identify chords by scale degree using Roman numerals
(I–ii–iii–IV–V–vi–vii°)

Expert Mode:
Learn to create interesting chord progressions using

- Secondary dominants
- Borrowed chords
- ii–V progressions
- Tritone substitutions
- Diminished chords
- V alternatives

Earn stars as you improve, stay motivated with a clear sense of progress, and review detailed statistics to see how far you’ve come.
When you want a real test, turn on Hard Mode for a tougher challenge.

Featuring English and German notation
(In German notation, B is written as H, and Bb as B.)

No in-app purchases or microtransactions!

It's never been so easy to build chord fluency :)

## Key features

- Master the Circle of Fifths
- Intuitive flashcard system
- Multiple difficulty modes (Basic, Advanced, Expert, Hard)
- Learn chord progressions
- Track progress with stars and statistics
- Supports English and German notation


## Frequently asked questions about Chord ProTrainer

### What is Chord ProTrainer?

Chord ProTrainer is a music education app designed to help users master the Circle of Fifths. It uses flashcards and practice modes to teach chord relationships and progressions.

### What modes are available in Chord ProTrainer?

Chord ProTrainer offers Basic, Advanced, Expert, and Hard modes. These cater to different learning stages, from understanding key positions to creating complex chord progressions.

### Does Chord ProTrainer support different musical notations?

Yes, Chord ProTrainer supports both English and German notation. In German notation, 'B' is written as 'H', and 'Bb' is written as 'B'.

### How does Chord ProTrainer help users stay motivated?

Users earn stars as they improve their skills and can review detailed statistics to see their progress. This gamified approach helps maintain motivation throughout the learning process.

### What kind of chord progressions can I learn with Chord ProTrainer?

Chord ProTrainer teaches you to create progressions using secondary dominants, borrowed chords, ii-V progressions, tritone substitutions, diminished chords, and V alternatives.

### Is Chord ProTrainer available on multiple devices?

Based on the provided data, Chord ProTrainer is currently supported on iPhone.

### How often is Chord ProTrainer updated?

The latest version, 1.2, was released on June 10, 2026, indicating active development and updates for the application.

### Does Chord ProTrainer have ads?

No, Chord ProTrainer is ad-free and does not contain any advertisements.

## Version history (last 5 releases)

### 1.3.1 — 2026-06-30

What's new in Version 1.3

- Expert Mode to build more interesting Chord progressions
- Explanations for each Challenge
- Enhanced Statistics
- UI Improvements
- Bug fixes

### 1.3 — 2026-06-30

Großes Update

- Expert Mode für spannendere Akkordfolgen
- Erklärungen zu jeder Challenge
- Verbesserte Statistiken
- UI-Verbesserungen
- Bugfixes

### 1.2 — 2026-06-10

- New metrics in the statistic view
- Text to Speech now works, even if the screen is off
- Small Improvements
- Bugfixes

### 1.1 — 2026-06-09

- new "Days Trained" statistic
- use a bluetooth remote control to answer the questions (alpha version)
- small improvements
- bugfixes

### 1.0 — 2026-04-27

No release notes.

## More apps by THILO ANSELM VOISSEL

- [Habit ProTrainer](https://appshunter.io/ios/app/habit-protrainer/id6757636838)

All apps by THILO ANSELM VOISSEL: https://appshunter.io/developer/1844378266

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-04.*