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App Store Apps > Music > MINI-COMPOSER by Karl Bartos
MINI-COMPOSER by Karl Bartos icon

MINI-COMPOSER by Karl Bartos

by Masayuki Akamatsu · Music · Free
On the App Store since March 2011 · Data updated 2026-10-22

MINI-COMPOSER by Karl Bartos is made and published by Masayuki Akamatsu. AppBrain is an independent app data site and isn't affiliated with Masayuki Akamatsu. The app name, icon, screenshots and description belong to Masayuki Akamatsu and are shown as published on the App Store.

AppBrain's verdict

Established
Rating on App Store
3.92
24 ratings
Last updated
August 29, 2026

It doesn't have enough ratings yet to judge what users think.

Official page on the App Store

Rankings

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Releases

Updates seen on the App Store
Version
1.2.4
Launched
March 2011

No changelog data

User feedback

Ratings and reviews on the App Store

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Technology

Found in the app by AppBrain
Price
Free
App size
16.1 MB
Content rating
Everyone

Technologies used by MINI-COMPOSER by Karl Bartos

About the app and developer

About MINI-COMPOSER by Karl Bartos

MINI-COMPOSER by Karl Bartos is a music app developed by Masayuki Akamatsu.

User Ratings

MINI-COMPOSER by Karl Bartos is rated 3.92 out of 5 stars. The rating is based on 24 ratings.

App Information

MINI-COMPOSER by Karl Bartos is freely available from the App Store. The app size is 16.15 MB. The latest version available is 1.2.4. The last update was on August 29, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since March 2011.

Developer information for Masayuki Akamatsu

Masayuki Akamatsu

Address:

Frequently asked questions about MINI-COMPOSER by Karl Bartos

Is MINI-COMPOSER by Karl Bartos free?

Yes. MINI-COMPOSER by Karl Bartos is free on the App Store.

Is MINI-COMPOSER by Karl Bartos still available?

Yes. MINI-COMPOSER by Karl Bartos is on the App Store, and the last update we saw was on August 29, 2026.

How large is MINI-COMPOSER by Karl Bartos?

MINI-COMPOSER by Karl Bartos is 16.15 MB.

Is MINI-COMPOSER by Karl Bartos suitable for children?

App Store rates the content of MINI-COMPOSER by Karl Bartos as suitable for everyone.

How do people rate MINI-COMPOSER by Karl Bartos?

MINI-COMPOSER by Karl Bartos scores 3.92 out of 5 stars, from 24 ratings on the App Store.

Who made MINI-COMPOSER by Karl Bartos?

MINI-COMPOSER by Karl Bartos was developed by Masayuki Akamatsu. It is listed in the music category on the App Store.

What are the best alternatives to MINI-COMPOSER by Karl Bartos?

People looking at MINI-COMPOSER by Karl Bartos also look at these music apps: King of FM 2: DX Synth/E Piano, AudioKit Synth One J6 + AUv3, Animoog Z Synthesizer, AudioKit Synth One Synthesizer, Maestro - Music Composer.

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Store listing

By Masayuki Akamatsu, from the App Store
MINI-COMPOSER by Karl Bartos Screenshot 1 of 5
MINI-COMPOSER by Karl Bartos Screenshot 2 of 5
MINI-COMPOSER by Karl Bartos Screenshot 3 of 5
MINI-COMPOSER by Karl Bartos Screenshot 4 of 5
MINI-COMPOSER by Karl Bartos Screenshot 5 of 5
Screenshots by Masayuki Akamatsu, from the the App Store listing
Description by Masayuki Akamatsu Written by the developer, not by AppBrain. Click to read.
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.
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