# Angles Alpha vs Joint Angle Measurement

The clearest difference is iOS requirement: Angles Alpha at 14.0 against Joint Angle Measurement's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Angles Alpha sells 1 in-app purchase, starting at $3.99 per month and Joint Angle Measurement sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 26, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Angles Alpha | Joint Angle Measurement |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/angles-alpha/id1529515988/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 32 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A.I. Initiatives, LLC](https://appshunter.io/developer/1222011220) | [ryo muranaka](https://appshunter.io/developer/1606480078) |

## What reviewers say

### Angles Alpha

[App page](https://appshunter.io/ios/app/angles-alpha/id1529515988)

This app tracks and records the relative angles of the human body, capturing movement data. Users can share this information with trusted individuals and access a history of their data. A free trial is available.

**Highlights:** Track relative body angles, Capture movement data, Record data history, Share data with others, Free 1-week trial

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Data Collection Access | $3.99 | per month |


### Joint Angle Measurement

[App page](https://appshunter.io/ios/app/joint-angle-measurement/id6752212531)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| subscription | $2.99 | per month |
| Subscription | $19.99 | per year |


## Frequently asked questions

### Is Angles Alpha free?

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

### Is Joint Angle Measurement free?

Joint Angle Measurement is free to download, with in-app purchases available.

### Do Angles Alpha or Joint Angle Measurement have ads?

Neither Angles Alpha nor Joint Angle Measurement shows ads.

### Which is updated more often, Angles Alpha or Joint Angle Measurement?

Angles Alpha ships an update weekly, and Joint Angle Measurement weekly. Most recently, Angles Alpha was updated on September 26, 2026 and Joint Angle Measurement on October 20, 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.*