# Knee Mobility vs ACL Rebuild

The clearest difference is price: ACL Rebuild at Free against Knee Mobility's $4.99. Knee Mobility's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On update cadence and ads there is nothing between them.

ACL Rebuild is free to download; Knee Mobility costs $4.99 up front. ACL Rebuild sells 3 in-app purchases, starting at $19.99 per month. Knee Mobility asks for nothing beyond the download.

Knee Mobility ships an update monthly, ACL Rebuild fortnightly. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Knee Mobility | ACL Rebuild |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Paid | — |
| Size | 300 MB | 144 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [MirrorAR LLC](https://appshunter.io/developer/1526484138) | [VisionFit](https://appshunter.io/developer/1810414588) |

## What reviewers say

### Knee Mobility

[App page](https://appshunter.io/ios/app/knee-mobility/id6621180556)

This app helps you track and improve your knee's range of motion through daily exercises. Monitor your progress over six weeks with insightful feedback to stay motivated on your journey to better knee health.

**Highlights:** Track knee range of motion, Daily exercises for knee health, Progress monitoring over six weeks, Feedback for motivation, General wellness and fitness focus

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

**In-app purchases:** none


### ACL Rebuild

[App page](https://appshunter.io/ios/app/acl-rebuild-strength-training/id6745011928)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $19.99 | per month |
| 6 Months | $89.99 | per 6 months |
| 12 Months | $99.99 | per year |


## Frequently asked questions

### Is Knee Mobility free?

Knee Mobility costs $4.99, with no in-app purchases.

### Is ACL Rebuild free?

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

### Do Knee Mobility or ACL Rebuild have ads?

Neither Knee Mobility nor ACL Rebuild shows ads.

### Which is updated more often, Knee Mobility or ACL Rebuild?

Knee Mobility ships an update monthly, and ACL Rebuild fortnightly. Most recently, Knee Mobility was updated on October 21, 2026 and ACL Rebuild on October 28, 2026.

---

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