# Poly 2 vs C.ARP

The clearest difference is price: Poly 2 at Free against C.ARP's $9.99. Poly 2 also leads on rating (4.8 vs 4.3) and review sentiment (84% vs 74%). C.ARP's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 16.6). On update cadence, ads and device support there is nothing between them.

Poly 2 is free to download; C.ARP costs $9.99 up front. Poly 2 sells 1 one-off in-app purchase. C.ARP asks for nothing beyond the download.

Poly 2 holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Poly 2 has 686 ratings behind it against 114, so its average is the more settled of the two. Written reviews point the same way: 84% of Poly 2's written reviews are positive against 74% of C.ARP's.

Both ship on a similar rhythm, roughly every 4 weeks. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Poly 2 | C.ARP |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.8 (686 ratings)](https://appshunter.io/ios/app/poly-2/id1477029326/reviews)** | [4.3 (114 ratings)](https://appshunter.io/ios/app/carp/id1481916004/reviews) |
| Number of ratings | **686** | 114 |
| Positive reviews | **84.1% of reviews** | 74.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | Every 4 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 153 MB | 45 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [James Milton](https://appshunter.io/developer/581503621) | [Paolo Giorgi](https://appshunter.io/developer/1481916003) |

## What reviewers say

### Poly 2

[App page](https://appshunter.io/ios/app/poly-2/id1477029326)

This app generates evolving musical patterns and melodies using polyrhythms. It offers extensive sound manipulation with a sampler, multiple effects, and the ability to store numerous configurations. Users can also import their own sounds and integrate with other music production tools.

**Highlights:** Generative polyrhythm sequencing, Up to 8 simultaneous sounds, Sampler with envelopes and filters, Randomize capabilities, Built-in delay, reverb, distortion, and EQ FX, AUv3, Audiobus, and IAA support, Import custom samples

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro mode | $11.99 | one-time |

**What reviewers like**

- 🚀 Unique, creative, and powerful tool
- 👍 Intuitive and user-friendly interface
- 🎨 Excellent for ambient, experimental, and generative music
- 🎹 Great for drum grooves and rhythmic patterns
- 💻 Seamless integration with external hardware and software

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔇 Lack of sustain/voice ring-out when transport is stopped
- 📺 Small interface elements can be difficult to use on iPad
- 🔌 Compatibility issues with some third-party apps

**Reported bugs**

- In-app purchase not working for some users
- MIDI connectivity issues with certain apps
- Crashes upon opening for some users

**Requested features**

- Ability to preview samples before importing
- Autoslice/autochop functionality for samples
- Support for larger sample imports and automatic slot filling
- Granulizer effect
- Note repeat and vinyl effects


### 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


## Frequently asked questions

### Is Poly 2 free?

Poly 2 is free to download, with in-app purchases available.

### Is C.ARP free?

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

### Which has better reviews, Poly 2 or C.ARP?

Poly 2 is rated higher. Poly 2 averages 4.8 out of 5 from 686 ratings, while C.ARP averages 4.3 from 114 ratings.

### Do Poly 2 or C.ARP have ads?

Neither Poly 2 nor C.ARP shows ads.

### Which is updated more often, Poly 2 or C.ARP?

Poly 2 ships an update every 4 weeks, and C.ARP every 4 weeks. Most recently, Poly 2 was updated on September 8, 2026 and C.ARP 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.*