midiGATEs vs ChaosArp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
midiGATEs
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.
- 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
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midiGATEs midi probability is an Audio Unit v3 MIDI Effect and CoreMIDI capable app. midiGATEs listens to MIDI input and based on random chance mutes some of the incoming notes to make a busy, repetitive stream of notes a little more interesting and sparser. It has four modes: Gate Mode - One set percentage to be muted for all notes. Also includes Gate On Repeats (when a note passes through unmuted, also pass through X more notes after) and Gate Off Repeats (when a note does not pass through the gate, also mute the next X notes) to make things a little more interesting. Note Mode - Each note in the scale (C, C#, D etc) has its own percentage chance to mute incoming notes. Sequencer Mode - Every eight notes has a different percentage chance to be muted. Can also change the sequence length to be less than eight. Thru Mode - Nothing is muted, normally not used but there if you need it. If midiGATEs is inserted as an AUv3 MIDI effect in a supported host such as Audiobus or AUM it should setup and work automatically. If you wish to use it without an Audio Unit host you can toggle the CoreMIDI input and output and use it that way.
ChaosArp
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.
- 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
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Introducing ChaosArp, the next-level MIDI arpeggiator/step sequencer designed to transform your musical ideas into intricate, dynamic patterns with a unique twist. ChaosArp is not just any arpeggiator; it's a powerhouse tool that uses the same advanced algorithms as LoAdKer to modulate pitch, rhythm, velocity, and duration, creating evolving, complex but high musical patterns that breathe life into your music. Dive into the heart of your creativity with ChaosArp's innovative ‘rhythm event’ feature, which allows you to explore a variety of rhythmic modifications. From repeaters to stretchers and rests for extra space and emphasis—ChaosArp has it all. Each one of these rhythm events can be assigned to any of the 6 available slots, offering limitless possibilities. Fine-tune your sonic exploration with the innovative ‘variance’ control - which goes one step beyond the simple ‘probability’ control that most arpeggiators have. Adjusting this setting for either pitch or rhythm (or both) will vary the character of the generated sequences, from fairly minimalistic to completely chaotic, thus opening up a world of endless variations. Elevate your music production today with ChaosArp and unleash patterns that inspire! Features: - Two modes: arpeggiator and stepper - 1-16 steps - Scale quantizer, never miss a note again! - Variable rate, from 1/128 to 4 beats - 3 arpeggiator modes (up, down, up/down) - 3 stepper modes (forward, backward, ping-pong) - 1 to 4 octaves range - Latch mode - Pitch randomizer with probability and variance control and random octave - Rhythm event selector with probability and variance control - 6 assignable rhythm event slots - 13 rhythm event algorithms, including repeaters, stretchers, and rests - Repeat, stretch, and repeat rest probability controls for further customization of the rhythm event algorithms - Randomizable velocity and duration with variable range - 4 performance buttons that temporarily override the probabilities of pitch, rhythm, velocity, and duration - Automatable parameters
Screenshots
Verdict
The clearest difference is update cadence: ChaosArp at every 2 weeks against midiGATEs's every 3 months. ChaosArp also leads on chart position (#183 vs unranked). 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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.
| Parameter | midiGATEs | ChaosArp |
|---|---|---|
| Price | $3.99 | $3.99 |
| Rating | 4.8 (13 ratings) | 4.9 (9 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 13 — better | 9 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #183 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.4 — better | 13.0 |
| Further details — not scored | ||
| Size | 2 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Arthur Kerns | Achillefs Sourlas |
Customer experience
midiGATEs
ChaosArp
In-app purchases
midiGATEs
No in-app purchases
ChaosArp
No in-app purchases









