---
title: "MINI-COMPOSER by Karl Bartos - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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, Osci"
---

# MINI-COMPOSER by Karl Bartos — United States
> and Masayuki Akamatsu

![MINI App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/c1/a0/73/c1a0730b-0fe9-9b3d-4319-3157b05f3bbc/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [正行 Akamatsu](https://apptail.io/developer/akamatsu-irl)
**Category:** Music
**Rating:** 3.9/5 (24 ratings)
**Price:** Free
**Bundle ID:** org.akamatsu.minicomposer
**Store:** Apple App Store
**Country:** United States
**Version:** 1.2.4 (released 2026-08-29)
**Original Release:** 2011-03-26
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id427541594)
**AppTail Page:** [https://apptail.io/app/mini-composer-by-karl-bartos-oonj/united-states](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/united-states)

## MINI Description
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.

## MINI Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/8b/80/19/8b8019e0-579d-08fa-5c81-7f1f00f7fe00/iPhone-1.png/2868x1320.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/08/63/59/086359ec-035d-98f3-a9af-e233410dd456/iPhone-2.png/2868x1320.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/e1/10/70/e11070d1-f559-7177-5c40-6e5c260de72f/iPhone-3.png/2868x1320.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/4b/2b/c3/4b2bc303-0681-51bf-3f98-f5c9d8bd73ea/iPhone-4.png/2868x1320.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/fc/a3/c3/fca3c3d8-0b28-0abe-3bdc-8a4be156a001/iPhone-5.png/2868x1320.png)

## MINI Rating Breakdown in United States
- 5 stars: 14 (58%)
- 4 stars: 4 (17%)
- 3 stars: 1 (4%)
- 2 stars: 0 (0%)
- 1 stars: 5 (21%)

## MINI Reviews in United States

### ****- "Simple and fun, but emphasis on simple"
This is a fun little step sequencer that has you creating music in seconds flat. My only complaint is it might be a little too simple. There are very few presets, a rather small grid and no option to import your own sounds. Without those features this is little more than a toy. That said, I assume it was the intent of the appmaker to create something basic and fun. If that is the case, this is a success.
-- 👹, 2013-07-27

### ***** "Pretty cool"
Simple but very fun! It's easy to work with, not complicated. If you're a Kraftwerk fan, you'll certain dig this app!
-- [.Sun.King.], 2012-04-16

### ***** "Best fun ever"
It's almost therapeutic.
-- The Bitter Herb, 2012-01-14

### ***** "Love it!"
This app is simple and great. The sounds are sexy and smooth.
-- marclusious, 2011-12-23

### ****- "Pretty fun"
Simple, fun
-- Boblio997, 2011-05-21

### ***** "Simple and Gratifying"
Playing around with this straight-forward mini-composer is a joy.  Compose your sequence over any of four repeating drum beats -- either add a considered composition or just add notes at random, it all works, and pretty soon you have a nice little soundtrack for your next minute or two.  The beats and the tones are all enjoyable, and the minimalist animation adds a surprising amount of happiness.  Bravo!
-- archesq, 2011-04-25

### ****- "Simple and fun"
It would get five but there no way to save and only a one octave major scale to work with. I would love to see a way to have more than one repeating measure as well.
-- Pengun86/a real live musician, 2011-04-23

### ***** "Great"
I love the idea
-- M1c4@3l, 2011-04-18

### ****- "Fun but..."
Some bugs and some complaints. I love the simplicity of it. Just screams kraftwork. But I kinda wish I could program my own drum sounds. I like all the synth sounds but I'd like to choose my own key. And the backgrounds could use a bit more color. 
It does tend to glitch when too many notes are happening but that might be my iPhone saying "whoa there guy, this is minimal not maximal!"
I do like it and I would recommend it for tiny sketches or maybe to sample the synth sounds.
-- hallospceboy, 2011-04-12

[View all MINI reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## MINI Discovered Keywords
- mini
- mini mini
- composer

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## MINI Available In
- [United States](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/united-states)
- [Germany](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/germany)
- [Japan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/japan)
- [United Kingdom](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/united-kingdom)
- [Australia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/australia)
- [Mexico](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/mexico)
- [Spain](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/spain)
- [Brazil](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/brazil)
- [France](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/france)
- [Italy](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/italy)
- [Finland](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/finland)
- [El Salvador](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/el-salvador)
- [Thailand](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/thailand)
- [Ukraine](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/ukraine)
- [Netherlands](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/netherlands)
- [Norway](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/norway)
- [Greece](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/greece)
- [Philippines](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/philippines)
- [Peru](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/peru)
- [Belgium](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/belgium)
- [China](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/china)
- [Portugal](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/portugal)
- [Argentina](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/argentina)
- [Czechia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/czechia)
- [Russia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/russia)
- [Sweden](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/sweden)
- [Singapore](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/singapore)
- [Jamaica](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/jamaica)
- [Jordan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/jordan)
- [South Korea](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/south-korea)
- [Kuwait](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/kuwait)
- [Kazakhstan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/kazakhstan)
- [Lebanon](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/lebanon)
- [Sri Lanka](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/sri-lanka)
- [Lithuania](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/lithuania)
- [Luxembourg](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/luxembourg)
- [Latvia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/latvia)
- [Madagascar](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/madagascar)
- [North Macedonia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/north-macedonia)
- [Mali](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/mali)
- [Macao SAR China](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/macau)
- [Malta](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/malta)
- [Malaysia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/malaysia)
- [Nigeria](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/nigeria)
- [Nepal](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/nepal)
- [New Zealand](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/new-zealand)
- [Panama](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/panama)
- [Pakistan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/pakistan)
- [Poland](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/poland)
- [Paraguay](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/paraguay)
- [Qatar](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/qatar)
- [Romania](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/romania)
- [Saudi Arabia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/saudi-arabia)
- [Slovenia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/slovenia)
- [Slovakia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/slovakia)
- [Senegal](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/senegal)
- [Tunisia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/tunisia)
- [Türkiye](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/turkey)
- [Taiwan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/taiwan)
- [Uganda](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/uganda)
- [Uruguay](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/uruguay)
- [Uzbekistan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/uzbekistan)
- [Venezuela](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/venezuela)
- [Vietnam](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/vietnam)
- [United Arab Emirates](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/united-arab-emirates)
- [South Africa](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/south-africa)
- [Armenia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/armenia)
- [Austria](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/austria)
- [Azerbaijan](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/azerbaijan)
- [Bulgaria](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/bulgaria)
- [Bermuda](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/bermuda)
- [Belarus](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/belarus)
- [Belize](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/belize)
- [Canada](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/canada)
- [Switzerland](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/switzerland)
- [Chile](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/chile)
- [Colombia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/colombia)
- [Cyprus](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/cyprus)
- [Denmark](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/denmark)
- [Dominican Republic](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/dominican-republic)
- [Algeria](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/algeria)
- [Ecuador](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/ecuador)
- [Estonia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/estonia)
- [Egypt](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/egypt)
- [Hong Kong SAR China](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/hong-kong)
- [Croatia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/croatia)
- [Hungary](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/hungary)
- [Indonesia](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/indonesia)
- [Ireland](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/ireland)
- [Israel](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/israel)
- [India](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/india)
- [Iceland](https://apptail.io/app/mini-composer-by-karl-bartos-oonj/iceland)

---

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