Mersenne vs miRack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mersenne
This app is an AUv3-compatible synthesizer designed to create bell-like metallic sounds. It combines FM synthesis, a noise generator, and a resonator for crafting clear tones and complex metallic textures.
- AUv3-compatible synthesizer
- Dual FM synthesis modules
- Noise generator
- Resonator
- Metallic sound design
- Bell-like tones
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Mersenne is an AUv3-compatible synthesizer that combines two FM synthesis modules, a noise generator, and a resonator to create bell-like metallic sounds. It is specifically designed for crafting both clear tones and complex textures with a distinctive metallic grit, making it an ideal tool for those deeply exploring metallic sound design. For more detailed information about the product, please visit the website. The website offers detailed product descriptions, manuals and videos, as well as important notices. https://icegear.net/
miRack
This app offers a comprehensive Eurorack-style modular synthesizer environment for creating custom synths, audio/MIDI effects, and controlling other applications. It features a vast library of modules and integrates with hardware and software for flexible music production and live performance.
- Polyphonic Eurorack-style modular environment
- Over 800 third-party modules
- AUv3 plugin hosting
- Multi-channel audio input/output
- MIDI input/output with clock sync
- Ableton Link support
- iCloud patch syncing
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miRack is a polyphonic Eurorack-style modular environment. It aims to provide user experience and audio quality close to those of the real Eurorack hardware. miRack can be used to build custom synthesizers, audio and MIDI effects, control other apps and equipment, as a playground to explore and learn modular synths, and for live performances. miRack is also available on macOS, including Audio Unit and VST plugins. * Comes with more than 800 modules created by third-party developers and adapted for mobile devices by miRack team. New modules are added regularly. * Includes AUv3 plugin. Can work as an instrument, audio effect or MIDI processor. Supports parameter automation to record and automate changes of almost any virtual module control. * AUv3 hosting capabilities (in-app purchase). Incorporate any AUv3 instrument, effect or MIDI effect plugins into your patches. * Controller module (in-app purchase) allows to design AUv3 user interface for your patch. * Multi-channel audio input and output (in both standalone and AUv3 modes), with full support for Expert Sleepers audio interface modules to integrate with hardware Eurorack equipment. * MIDI input and output, including MIDI clock sync, and MIDI learn function. Automate and control your patch, or control other software and hardware instruments with powerful sequencer modules. * Ableton Link support to synchronise with other music software on the same device or over network. * iCloud support to sync patches between iOS and macOS app versions. * Visit patchstorage.com/platform/mirack for inspiration and to share your patches.
Screenshots
Verdict
The clearest difference is in-app purchases: Mersenne at none against miRack's 5. Mersenne also leads on price ($8.00 vs $14.99) and iOS requirement (12.0 vs 14.0). miRack's advantage is update cadence (weekly vs monthly) and ratings volume (683 vs 28). On rating, review sentiment, ads and device support 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
Mersenne costs $8.00 and miRack $14.99 up front. miRack sells 5 one-off in-app purchases. Mersenne asks for nothing beyond the download.
miRack holds the better App Store score, 4.8 against 4.7. That said, the two scores are not equally well evidenced: miRack has 683 ratings behind it against 28, so its average is the more settled of the two. Written reviews complicate that: 88% of Mersenne's written reviews are positive against 86% of miRack's, so the app with the better star average is not the one people write more warmly about.
Mersenne ships an update monthly, miRack weekly. The most recent releases landed on November 2, 2026 and November 11, 2026 respectively.
| Parameter | Mersenne | miRack |
|---|---|---|
| Price | $8.00 — better | $14.99 |
| Rating | 4.7 (28 ratings) | 4.8 (683 ratings) — better |
| Positive reviews | 87.5% of reviews — better | 85.9% of reviews |
| Number of ratings | 28 | 683 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 11 MB | 359 MB |
| Age rating | 4+ | 4+ |
| Developer | iceWorks, Inc. | MIFKI PTY LTD |
Customer experience
Mersenne
miRack
Bugs and requests
Mersenne
Not enough reviews yet to summarise bugs or requests.
miRack
Reported bugs
3 issues- Knob controls sometimes become unresponsive
- Saving and loading patches can be unreliable
- Compatibility issues with older iPad models
Requested features
5 requests- Add polyphonic support
- Implement undo/redo functionality
- Integrate with popular DAWs and audio apps
- Provide more comprehensive module library
- Add preset management and sharing options
In-app purchases
Mersenne
No in-app purchases
miRack
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$4.99
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- AUv3 Hosting Modules$4.99
- Controller Module$4.99









