# BK21 Rehab Protocol vs Goniometer

BK21 Rehab Protocol and Goniometer 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. Neither carries in-app purchases, so what you see is what you pay.

BK21 Rehab Protocol ships an update every 9 days, Goniometer every 5 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | BK21 Rehab Protocol | Goniometer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 28 MB | 70 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [R4BL MEDIA RADOSLAW BARANSKI](https://appshunter.io/developer/1854748688) | [Procaryote](https://appshunter.io/developer/1591970439) |

## What reviewers say

### BK21 Rehab Protocol

[App page](https://appshunter.io/ios/app/bk21-rehab-protocol/id6755598216)

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

**In-app purchases:** none


### Goniometer

[App page](https://appshunter.io/ios/app/goniometer-range/id6780147865)

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

**In-app purchases:** none


## Frequently asked questions

### Is BK21 Rehab Protocol free?

BK21 Rehab Protocol is free to download, with no in-app purchases.

### Is Goniometer free?

Goniometer is free to download, with no in-app purchases.

### Do BK21 Rehab Protocol or Goniometer have ads?

Neither BK21 Rehab Protocol nor Goniometer shows ads.

### Which is updated more often, BK21 Rehab Protocol or Goniometer?

BK21 Rehab Protocol ships an update every 9 days, and Goniometer every 5 days. Most recently, BK21 Rehab Protocol was updated on October 24, 2026 and Goniometer on October 28, 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.*