# midiGATEs vs ChaosArp

The clearest difference is update cadence: ChaosArp at every 2 weeks against midiGATEs's every 3 months. midiGATEs's advantage is review sentiment (100% vs 83%) and iOS requirement (11.4 vs 13.0). On price, rating, ratings volume and ads there is nothing between them.

midiGATEs costs $3.99 and ChaosArp $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for midiGATEs against 4.9 for ChaosArp. Both are backed by a comparable volume of ratings — 13 and 9 respectively. Written reviews are what separate them: 100% of midiGATEs's written reviews are positive against 83% of ChaosArp's.

midiGATEs ships an update every 3 months, ChaosArp every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | midiGATEs | ChaosArp |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | [4.8 (13 ratings)](https://appshunter.io/ios/app/midigates-midi-probability/id1226296557/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/chaosarp/id6497066359/reviews)** |
| Number of ratings | **13** | 9 |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Paid | Paid |
| Size | 2 MB | 17 MB |
| Requires iOS | **11.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arthur Kerns](https://appshunter.io/developer/998273840) | [Achillefs Sourlas](https://appshunter.io/developer/6813431693) |

## What reviewers say

### midiGATEs

[App page](https://appshunter.io/ios/app/midigates-midi-probability/id1226296557)

This app introduces randomness to MIDI note streams, selectively muting notes to create sparser, more dynamic musical patterns. It offers multiple modes for controlling muting probability based on note, scale, or sequence position.

**Highlights:** Random MIDI note muting, Four distinct muting modes, Gate On/Off Repeats for dynamic control, Note-specific muting percentages, Sequencer-based muting patterns, CoreMIDI and AUv3 support

**In-app purchases:** none


### ChaosArp

[App page](https://appshunter.io/ios/app/chaosarp/id6497066359)

This music app generates complex and dynamic MIDI patterns using advanced algorithms. It offers a unique rhythm event feature and variance control for extensive customization, allowing users to create evolving musical sequences.

**Highlights:** Arpeggiator and step sequencer modes, Rhythm event feature with 13 algorithms, Pitch and rhythm variance control, Scale quantizer, Randomizable velocity and duration, 4 performance buttons

**In-app purchases:** none


## Frequently asked questions

### Is midiGATEs free?

midiGATEs costs $3.99, with no in-app purchases.

### Is ChaosArp free?

ChaosArp costs $3.99, with no in-app purchases.

### Which has better reviews, midiGATEs or ChaosArp?

ChaosArp is rated higher. midiGATEs averages 4.8 out of 5 from 13 ratings, while ChaosArp averages 4.9 from 9 ratings.

### Do midiGATEs or ChaosArp have ads?

Neither midiGATEs nor ChaosArp shows ads.

### Which is updated more often, midiGATEs or ChaosArp?

midiGATEs ships an update every 3 months, and ChaosArp every 2 weeks. Most recently, midiGATEs was updated on October 24, 2026 and ChaosArp on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*