MINI-COMPOSER by Karl Bartos
Masayuki Akamatsu Music iPhoneiPadiPod touch
MINI-COMPOSER by Karl Bartos is a free Music app for iPhone and iPad by Masayuki Akamatsu. Rated 3.9/5 from 24 ratings. Requires iOS 12.0.
- Rating
- 3.9
- 24 ratings
- Price
- Free
- on the App Store
- Size
- 16 MB
- Age 4+
- Updated
- Aug 29
- 2026 · v1.2.4
Screenshots
About MINI-COMPOSER by Karl Bartos
Karl Bartos (electronic musician, ex-KW, co-composer of songs like The Robots, The Model, Computer World,...) and Masayuki Akamatsu (media artist and author of various iPhone apps such as Banner, Oscillator, Echochops,...) create a 16 step music sequencer which is free, simple and fun. The executive producer is Jean-Marc Lederman. We have created this simple music app for fun: it implements the basic waves of a synthesizer with a 16 step sequencer. This app is completely free, but we would be glad if you would consider a donation to the Red Cross. In 2011, the year we were making this app, the Great East Japan Earthquake struck, and we released it as donationware to support the people affected. The damage from that disaster has still not fully healed, and disasters have continued to occur around the world since then. We continue to ask for your support. This application has the functions listed below. - 16 steps sequencer - Start/stop sequence - Multi-touch note input - 32 polyphonic tones + 1 drum track - 4 waves (saw, triangular, square, sine) - 4 drumbeat loops - Drums on/off - Random notes - Clear notes - Additional information Please enjoy our music and think World.
Ratings & reviews
3.9
24 ratings
What’s new
Version 1.2.4 · Updated August 29, 2026
Minor improvements.
App privacy
The developer, Masayuki Akamatsu, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to MINI-COMPOSER by Karl Bartos
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| MINI-COMPOSER by Karl Bartos | 3.9 / 5 (24 ratings) | Free | August 29, 2026 | |
| Degenson | 5.0 / 5 (8) | Free | Oct 20, 2026 | Compare |
| BeatRepeat | 5.0 / 5 (5) | Free | Apr 24, 2026 | Compare |
| Etherpad | 4.9 / 5 (21) | Free | Oct 11, 2026 | Compare |
| Tape Loop Machine | 4.8 / 5 (18) | Free | Jun 26, 2026 | Compare |
| BattleFX | 4.9 / 5 (12) | Free | Jun 9, 2026 | Compare |
| AudioKit Synth One J6 + AUv3 | 4.9 / 5 (2,482) | Free | Oct 18, 2026 | Compare |