# C.ARP vs Omni

The clearest difference is price: Omni at Free against C.ARP's $9.99. Omni also leads on rating (5.0 vs 4.3). C.ARP's advantage is in-app purchases (none vs 1) and ratings volume (114 vs 4). On update cadence, ads and device support there is nothing between them.

Omni is free to download; C.ARP costs $9.99 up front. Omni sells 1 one-off in-app purchase. C.ARP asks for nothing beyond the download.

Omni holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: C.ARP has 114 ratings behind it against 4, so its average is the more settled of the two.

C.ARP ships an update every 4 weeks, Omni fortnightly. Both last shipped on September 22, 2026.

## The numbers

| Metric | C.ARP | Omni |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.3 (114 ratings)](https://appshunter.io/ios/app/carp/id1481916004/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/omni-pocket-synth/id6767987170/reviews)** |
| Number of ratings | **114** | 4 |
| Positive reviews | 74.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 45 MB | 12 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Paolo Giorgi](https://appshunter.io/developer/1481916003) | [Ruben Terron Rodriguez](https://appshunter.io/developer/1876605725) |

## What reviewers say

### C.ARP

[App page](https://appshunter.io/ios/app/carp/id1481916004)

This app offers a unique approach to music creation, inspired by vintage instruments. It allows users to play chords and melodies with intuitive touch controls, apply real-time audio effects, and utilize a dynamic rhythm section. Advanced features include sampling, MIDI output via Bluetooth, and an iPad-optimized interface.

**Highlights:** Chord and melody playing, Real-time audio effects, Dynamic rhythm section, Sampling and looping, MIDI output via Bluetooth, iPad optimized interface, In-app tutorial

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎶 Authentic omnichord sound
- 💡 Great for learning music theory
- 🤩 Fun and enjoyable to use
- 📱 Accessible on mobile devices
- 💰 Affordable alternative to real omnichord

**What reviewers complain about**

- 🔊 No sound issue
- 💥 Frequent crashes
- 🤔 Confusing interface/menus
- 🐌 Slow UI responsiveness
- 🎚️ Limited sound design options

**Reported bugs**

- Sound doesn't work
- No sound
- App crashes when opening
- App crashes when trying to open
- App auto-quits on start

**Requested features**

- Rearrange layout to be chromatic
- AUV3 support
- Inter-app-audio / GarageBand integration
- MIDI out functionality
- Save last state


### Omni

[App page](https://appshunter.io/ios/app/omni-pocket-synth/id6767987170)

Create music with a touch-first instrument for chords, strums, and rhythmic ideas. Shape synth sounds, add effects, and send MIDI to other apps or hardware. Designed for fast, expressive musical performance without complexity.

**Highlights:** Touch-based chord and strum performance, Dual synth engines with performance controls, Built-in ARP and drum sequencer, Performance effects (reverb, delay, etc.), Customizable chord layouts, MIDI Out for external control, AUv3 Instrument support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Omni Pro | $8.99 | one-time |


## Frequently asked questions

### Is C.ARP free?

C.ARP costs $9.99, with no in-app purchases.

### Is Omni free?

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

### Which has better reviews, C.ARP or Omni?

Omni is rated higher. C.ARP averages 4.3 out of 5 from 114 ratings, while Omni averages 5.0 from 4 ratings.

### Do C.ARP or Omni have ads?

Neither C.ARP nor Omni shows ads.

### Which is updated more often, C.ARP or Omni?

C.ARP ships an update every 4 weeks, and Omni fortnightly. Most recently, C.ARP was updated on September 22, 2026 and Omni on September 22, 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.*