# Poly 2 vs King Key

The clearest difference is price: Poly 2 at Free against King Key's $1.99. Poly 2 also leads on ratings volume (686 vs 15). King Key's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 84%). On rating, ads and device support there is nothing between them.

Poly 2 is free to download; King Key costs $1.99 up front. Poly 2 sells 1 one-off in-app purchase. King Key asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Poly 2 against 4.9 for King Key. That said, the two scores are not equally well evidenced: Poly 2 has 686 ratings behind it against 15, so its average is the more settled of the two. Written reviews are what separate them: 84% of Poly 2's written reviews are positive against 100% of King Key's.

## The numbers

| Metric | Poly 2 | King Key |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.8 (686 ratings)](https://appshunter.io/ios/app/poly-2/id1477029326/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/king-key/id6504887055/reviews)** |
| Number of ratings | **686** | 15 |
| Positive reviews | 84.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | — |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 153 MB | 12 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [James Milton](https://appshunter.io/developer/581503621) | [Caelum Audio](https://appshunter.io/developer/1463219587) |

## 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


### King Key

[App page](https://appshunter.io/ios/app/king-key/id6504887055)

This app provides high-quality one-shot keyboard samples, including vintage typewriters and modern synthesizers. It offers 9 instruments and 11 presets, usable as a standalone instrument or an AUv3 plugin within music production hosts.

**Highlights:** High-quality one-shot keyboard samples, Vintage typewriter and MIDI keyboard sounds, 9 instruments and 11 presets, AUv3 plugin compatibility, Standalone instrument mode, Proprietary high-detailed sampling techniques

**In-app purchases:** none


## Frequently asked questions

### Is Poly 2 free?

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

### Is King Key free?

King Key costs $1.99, with no in-app purchases.

### Which has better reviews, Poly 2 or King Key?

King Key is rated higher. Poly 2 averages 4.8 out of 5 from 686 ratings, while King Key averages 4.9 from 15 ratings.

### Do Poly 2 or King Key have ads?

Neither Poly 2 nor King Key shows ads.

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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.*