# FormKey vs 852 Player Plus

The clearest difference is update cadence: FormKey at fortnightly against 852 Player Plus's every 4 months. 852 Player Plus's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. FormKey sells 1 one-off in-app purchase and 852 Player Plus sells 11 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

FormKey ships an update fortnightly, 852 Player Plus every 4 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | FormKey | 852 Player Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/formkey/id1535350561/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Paid | — |
| Size | 86 MB | 79 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedra](https://appshunter.io/developer/1535350563) | [SYQEL INC](https://appshunter.io/developer/1671066431) |

## What reviewers say

### FormKey

[App page](https://appshunter.io/ios/app/formkey/id1535350561)

This app is an intuitive MIDI controller that helps musicians improve by using shapes for notes and colors for octaves. Its unique isomorphic keys aid in pattern recognition and chord discovery, making music creation more accessible.

**Highlights:** Shape-based note input, Color-coded octaves, Isomorphic key layout, Pattern recognition aid, Chord discovery assistance, Future update commitment

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FormKey Full Unlock | $14.99 | one-time |


### 852 Player Plus

[App page](https://appshunter.io/ios/app/852-player-plus/id6739763301)

**Features:** Family Sharing, Siri integration

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited 852 Hz retuning forever. | $19.99 | one-time |
| Frequency - 174 Hz | $19.99 | one-time |
| Frequency - 396 Hz | $19.99 | one-time |
| Frequency - 528 Hz | $19.99 | one-time |
| Frequency - 417 Hz | $19.99 | one-time |
| Frequency - 432 Hz | $19.99 | one-time |
| Frequency - 285 Hz | $19.99 | one-time |
| Frequency - 741 Hz | $19.99 | one-time |
| Frequency - 963 Hz | $19.99 | one-time |
| Frequency - 639 Hz | $19.99 | one-time |
| Solfeggio Core Bundle | $59.99 | one-time |


## Frequently asked questions

### Is FormKey free?

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

### Is 852 Player Plus free?

852 Player Plus is free to download, with in-app purchases available.

### Do FormKey or 852 Player Plus have ads?

Neither FormKey nor 852 Player Plus shows ads.

### Which is updated more often, FormKey or 852 Player Plus?

FormKey ships an update fortnightly, and 852 Player Plus every 4 months. Most recently, FormKey was updated on October 6, 2026 and 852 Player Plus on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*