Circle of Fifths vs Note a problem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Circle of Fifths
Explore music theory with a visual representation of the 12 keys. Understand scales, compose chord progressions, and mix in key. Features color-coded relationships, key signatures, and sounded chords for each key.
- Color-coded key relationships
- Key signature and triad display
- Sounded chords and arpeggios
- Lockable circle to selected key
- Tappable legend for key degrees
- Multiple color schemes
- Modern UI
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The circle of fifths (Sometimes called circle of fourths) is a great tool for understanding the music theory behind the 12 keys of the chromatic scale. It is useful for visualizing the music notation of the different scales, composing chord progressions/modulations and mixing in key. Features: - Color-coded relationship between the major, minor and diminished keys - Key signature and triad for each key - A sounded chord/arpeggio for each key (With mute/unmute toggle) - Ability to lock the circle to currently selected key - A tappable legend indicating the degree of each key in the currently selected group - Several color schemes - Modern UI following material design guidelines I hope you enjoy using this circle of 5ths app as much I as I enjoyed making it! Have fun! - Josh
Note a problem
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This is an app for quickly playing sheet music on your handheld device.
Screenshots
Verdict
The clearest difference is update cadence: Note a problem at every 3 weeks against Circle of Fifths's every 16 months. Circle of Fifths's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Circle of Fifths ships an update every 16 months, Note a problem every 3 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | Circle of Fifths | Note a problem |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (233 ratings) — better | — |
| Positive reviews | 97.5% of reviews | — |
| Number of ratings | 233 — better | — |
| Update frequency | Every 16 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Josh Liebe (Pty) Ltd | Timas Ljungdahl |
Bugs and requests
Circle of Fifths
Reported bugs
2 issues- Incorrect chord notation for some keys
- Slow launch time on certain devices
Requested features
4 requests- Ability to change chord voicings
- Support for other musical modes (Dorian, Mixolydian, etc.)
- Option to display scale degrees/Roman numerals
- Accessibility improvements for visually impaired users
Note a problem
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Circle of Fifths
No in-app purchases
Note a problem
No in-app purchases
Questions
Is Circle of Fifths free?
Is Note a problem free?
Do Circle of Fifths or Note a problem have ads?
Which is updated more often, Circle of Fifths or Note a problem?
Other comparisons
