# AutoArp vs Poly 2

The clearest difference is rating: Poly 2 at 4.8 against AutoArp's 4.3. Poly 2 also leads on update cadence (every 4 weeks vs every 4 months) and ratings volume (686 vs 26). AutoArp's advantage is iOS requirement (10.0 vs 16.6). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. AutoArp sells 1 one-off in-app purchase and Poly 2 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

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 26, so its average is the more settled of the two. Written reviews point the same way: 82% of AutoArp's written reviews are positive against 84% of Poly 2's.

AutoArp ships an update every 4 months, Poly 2 every 4 weeks. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | AutoArp | Poly 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (26 ratings)](https://appshunter.io/ios/app/autoarp/id413244255/reviews) | **[4.8 (686 ratings)](https://appshunter.io/ios/app/poly-2/id1477029326/reviews)** |
| Number of ratings | 26 | **686** |
| Positive reviews | 82.1% of reviews | **84.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 153 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Drew Milloy](https://appshunter.io/developer/328220392) | [James Milton](https://appshunter.io/developer/581503621) |

## 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 |


### 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


## Frequently asked questions

### Is AutoArp free?

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

### Is Poly 2 free?

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

### Which has better reviews, AutoArp or Poly 2?

Poly 2 is rated higher. AutoArp averages 4.3 out of 5 from 26 ratings, while Poly 2 averages 4.8 from 686 ratings.

### Do AutoArp or Poly 2 have ads?

Neither AutoArp nor Poly 2 shows ads.

### Which is updated more often, AutoArp or Poly 2?

AutoArp ships an update every 4 months, and Poly 2 every 4 weeks. Most recently, AutoArp was updated on October 7, 2026 and Poly 2 on October 8, 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.*