Comparison

MINI vs 4trMTR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MINI

Create music with a free, 16-step sequencer featuring basic synthesizer waves and drum loops. Enjoy multi-touch note input and Wi-Fi sync for collaborative jamming. A simple and fun tool for electronic music enthusiasts.

Highlights
  • 16-step sequencer
  • Multi-touch note input
  • 32 polyphonic tones + 1 drum track
  • 4 synthesizer waves
  • 4 drumbeat loops
  • Wi-Fi sync play
Features
Read full 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.

About

4trMTR

Record and layer multiple musical performances one track at a time to create a complete song. Easily manage your projects by saving, loading, and creating new ones through a simple tap interface.

Highlights
  • Four-track recording
  • Layered performances
  • Project saving
  • Project loading
  • New project creation
Features
Read full description

iPhoneを、シンプルな4トラックMTRに。 4trMTRは、ギター、ベース、ボーカルなどを1トラックずつ重ねて録音できる、シンプルなマルチトラックレコーダーです。 曲のアイデアを思いついたとき。 バンドのデモを作りたいとき。 楽器や歌を重ねて録音したいとき。 複雑なDAWを立ち上げなくても、iPhoneですぐに録音を始められます。 【シンプルな4トラック録音】 4つのトラックを使って、演奏や歌を重ねて録音できます。 例えば、 Track 1:ギター Track 2:ボーカル Track 3:ベース Track 4:コーラス といった使い方ができます。 【パンチイン録音】 録り直したい部分だけを指定して再録音できます。 演奏の一部分を修正したいときにも、最初からすべて録り直す必要はありません。 【入力を選んで録音】 利用可能な入力から、録音に使用する入力を選択できます。 iPhoneだけで手軽に録音したり、対応する外部オーディオ機器を使った録音にも活用できます。 【プロジェクトとして保存】 録音した内容はプロジェクトとして管理できます。 曲のアイデアやデモを残し、あとから続きを録音できます。 【シンプルだから、すぐ録れる】 初めてのレコーディングはカセットでした。 大した機能はなかったけれど、何でも作れる気がしました。 4trMTRは、そんなシンプルな録音の楽しさをiPhoneで再現するためのアプリです。 たくさんの機能を覚えるより、まず録音する。 楽器を持って、RECを押して、音を重ねる。 4trMTRで、あなたの曲のアイデアを残してみてください。

Screenshots

MINI4 screens
4trMTR3 screens

Verdict

The call

The clearest difference is price: MINI at Free against 4trMTR's $0.99. MINI also leads on iOS requirement (12.0 vs 17.6). 4trMTR's advantage is review sentiment (100% vs 74%). On update cadence, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

MINI is free to download; 4trMTR costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MINI ships an update monthly, 4trMTR every 3 weeks. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
MINI versus 4trMTR: the parameters behind the verdict, then further details
ParameterMINI4trMTR
PriceFree — better$0.99
Rating3.9 (24 ratings) — better—
Positive reviews73.8% of reviews100.0% of reviews — better
Number of ratings24 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size16 MB12 MB
Age rating4+4+
DeveloperMasayuki AkamatsuYUKIO TOKIWA

Customer experience

MINI

All ratings24 ratings
Positive75.0%
Neutral4.2%
Negative20.8%
Written reviews42 reviews
Positive73.8%
Neutral7.1%
Negative19.0%

4trMTR

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

MINI

No in-app purchases

None

4trMTR

No in-app purchases

Questions

Is MINI free?
MINI is free to download, with no in-app purchases.
Is 4trMTR free?
4trMTR costs $0.99, with no in-app purchases.
Do MINI or 4trMTR have ads?
Neither MINI nor 4trMTR shows ads.
Which is updated more often, MINI or 4trMTR?
MINI ships an update monthly, and 4trMTR every 3 weeks. Most recently, MINI was updated on October 23, 2026 and 4trMTR on October 31, 2026.

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