# miRack vs Audulus 4

The clearest difference is price: Audulus 4 at Free against miRack's $14.99. miRack's advantage is rating (4.8 vs 4.3) and update cadence (weekly vs monthly). On ads, in-app purchases, monetization model and device support there is nothing between them.

Audulus 4 is free to download; miRack costs $14.99 up front. miRack sells 5 one-off in-app purchases and Audulus 4 sells 27 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

miRack holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: miRack has 674 ratings behind it against 74, so its average is the more settled of the two. Written reviews point the same way: 86% of miRack's written reviews are positive against 69% of Audulus 4's.

miRack ships an update weekly, Audulus 4 monthly. The most recent releases landed on September 25, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | miRack | Audulus 4 |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | **[4.8 (674 ratings)](https://appshunter.io/ios/app/mirack/id1468259834/reviews)** | [4.3 (74 ratings)](https://appshunter.io/ios/app/audulus-4/id1592022030/reviews) |
| Number of ratings | **674** | 74 |
| Positive reviews | **85.9% of reviews** | 69.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 359 MB | 103 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [MIFKI PTY LTD](https://appshunter.io/developer/316521224) | [Audulus LLC](https://appshunter.io/developer/452619536) |

## What reviewers say

### miRack

[App page](https://appshunter.io/ios/app/mirack/id1468259834)

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.

**Highlights:** 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

**Features:** Family Sharing, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| AUv3 Hosting Modules | $4.99 | one-time |
| Controller Module | $4.99 | one-time |

**What reviewers like**

- 🚀 Powerful modular synth capabilities
- 👍 Intuitive touch-based interface
- 🎨 Vast selection of modules
- 💰 Great value for the price
- 🔌 Seamless integration with external controllers

**What reviewers complain about**

- 🐛 Occasional crashes and stability issues
- 📚 Lack of built-in documentation and tutorials
- 🔀 Difficulty navigating and managing patches
- 🔇 Missing audio recording and export features

**Reported bugs**

- Knob controls sometimes become unresponsive
- Saving and loading patches can be unreliable
- Compatibility issues with older iPad models

**Requested features**

- 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


### Audulus 4

[App page](https://appshunter.io/ios/app/audulus-4/id1592022030)

Create and shape sounds with a professional-grade modular synthesizer environment. Explore a vast library of modules for synthesis and sound design, with the option to expand your toolkit with premium instruments and effects. Available across Apple devices for seamless workflow.

**Highlights:** Modular synthesizer environment, Sound design tools, Real-time audio shaping, Extensive module library, Premium Pro Modules (in-app purchases), Cross-device iCloud sync, AUv3 plugin support

**Features:** Vision Pro support

**In-app purchases (27)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audulus Pro (1 Month) | $4.99 | per month |
| Audulus Pro (1 Year) | $29.99 | per year |
| 1-shot Sample | $1.99 | one-time |
| P-Train | $2.99 | one-time |
| CLK RS-1 | $3.99 | one-time |
| CG-1 Chord Generator | $3.99 | one-time |
| CLK Clock Generator | $4.99 | one-time |
| MetaEnvelope | $4.99 | one-time |
| Modal Percussion | $4.99 | one-time |
| CLK: TimeWarp | $4.99 | one-time |
| CPR-1 | $4.99 | one-time |
| LMT-1 | $4.99 | one-time |
| MS-FUNC | $5.99 | one-time |
| CLK SS-516 | $7.99 | one-time |
| J-23 Reverb | $7.99 | one-time |
| J-23 Effects | $7.99 | one-time |
| CLK GS-1 | $7.99 | one-time |
| Chaos LFO Bundle | $7.99 | one-time |
| ARP-1 | $7.99 | one-time |
| CPR-3 | $7.99 | one-time |
| SynD-K1 | $7.99 | one-time |
| TRIKOR VCO | $9.99 | one-time |
| CLK Tools Bundle | $9.99 | one-time |
| Essential Synth Bundle | $9.99 | one-time |
| VCF Bundle 1 | $9.99 | one-time |
| J-23 Space Console | $14.99 | one-time |
| Patch Editing | $29.99 | one-time |

**What reviewers like**

- ✨ Powerful modular environment
- 💡 Deep DSP programming capabilities
- 🎨 Intuitive and beautiful UI
- 🚀 Seamless workflow across devices
- 📚 Great for learning synthesis

**What reviewers complain about**

- 💸 Expensive in-app purchases/subscriptions
- ⚠️ Steep learning curve for beginners
- 📱 UI issues on mobile (scrolling, view obstruction)
- 📉 High CPU usage
- ❓ Lack of comprehensive documentation

**Reported bugs**

- iOS 18 compatibility issues (app not working)
- Save presets but no 'Load' button
- Undo command issues with DAWs
- CMD+Z causing data loss
- Opt+drag not duplicating modules

**Requested features**

- Add 'Load' button for presets
- Improve DAW integration (Undo, duplicate)
- Resizable plugin window
- More modules (FFT/IFFT, granular buffering)
- Add CC in module


## Frequently asked questions

### Is miRack free?

miRack costs $14.99, and also offers in-app purchases.

### Is Audulus 4 free?

Audulus 4 is free to download, with in-app purchases available.

### Which has better reviews, miRack or Audulus 4?

miRack is rated higher. miRack averages 4.8 out of 5 from 674 ratings, while Audulus 4 averages 4.3 from 74 ratings.

### Do miRack or Audulus 4 have ads?

Neither miRack nor Audulus 4 shows ads.

### Which is updated more often, miRack or Audulus 4?

miRack ships an update weekly, and Audulus 4 monthly. Most recently, miRack was updated on September 25, 2026 and Audulus 4 on September 12, 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.*