# FormKey vs HarmonyAngel

FormKey and HarmonyAngel are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. FormKey sells 1 one-off in-app purchase and HarmonyAngel sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

FormKey ships an update fortnightly, HarmonyAngel every 4 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | FormKey | HarmonyAngel |
| --- | --- | --- |
| 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 weeks |
| Monetization | Paid | — |
| Size | 86 MB | 7 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Polyhedra](https://appshunter.io/developer/1535350563) | [Better World Studio](https://appshunter.io/developer/424394067) |

## 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 |


### HarmonyAngel

[App page](https://appshunter.io/ios/app/harmonyangel/id6794364693)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Monthly Subscription | $1.99 | per month |
| Yearly Subscription | $9.99 | per year |
| Life-time Purchase | $19.99 | one-time |


## Frequently asked questions

### Is FormKey free?

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

### Is HarmonyAngel free?

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

### Do FormKey or HarmonyAngel have ads?

Neither FormKey nor HarmonyAngel shows ads.

### Which is updated more often, FormKey or HarmonyAngel?

FormKey ships an update fortnightly, and HarmonyAngel every 4 weeks. Most recently, FormKey was updated on October 6, 2026 and HarmonyAngel on October 10, 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.*