# AutoArp vs C.ARP

The clearest difference is price: AutoArp at Free against C.ARP's $9.99. AutoArp also leads on iOS requirement (10.0 vs 15.0). C.ARP's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 4 months). On rating, review sentiment, ads and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.3 for AutoArp against 4.3 for C.ARP. Both are backed by a comparable volume of ratings — 26 and 114 respectively. Written reviews are what separate them: 82% of AutoArp's written reviews are positive against 75% of C.ARP's.

AutoArp ships an update every 4 months, C.ARP monthly. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | AutoArp | C.ARP |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.3 (26 ratings)](https://appshunter.io/ios/app/autoarp/id413244255/reviews) | [4.3 (114 ratings)](https://appshunter.io/ios/app/carp/id1481916004/reviews) |
| Number of ratings | 26 | **114** |
| Positive reviews | **82.1% of reviews** | 74.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | — | **#114** |
| Size | 5 MB | 46 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Drew Milloy](https://appshunter.io/developer/328220392) | [Paolo Giorgi](https://appshunter.io/developer/1481916003) |

## What reviewers say

### AutoArp

[App page](https://appshunter.io/ios/app/autoarp/id413244255)

This app transforms your device into a unique musical instrument, blending auto-harp and analog synth sounds. Select chords and strum to create retro-futuristic music. A free version offers basic functionality, with advanced features available via in-app purchase.

**Highlights:** Strummable synth interface, Chord selection and configuration, Square, pulse, and sawtooth waveforms, Resonant low-pass filter, Tremolo and echo effects, Audiobus and inter-app audio support, MIDI support (paid)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full functionality | $0.99 | one-time |


### C.ARP

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

**Currently charting:** #114 Top Paid · Music (US App Store)

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 AutoArp free?

AutoArp 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, AutoArp or C.ARP?

AutoArp and C.ARP are both rated 4.3 out of 5 on the App Store, from 26 and 114 ratings respectively.

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

Neither AutoArp nor C.ARP shows ads.

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

AutoArp ships an update every 4 months, and C.ARP monthly. Most recently, AutoArp was updated on October 7, 2026 and C.ARP on October 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.*