# ACL Rehab Tracker vs DoubleTime Timer

The clearest difference is price: ACL Rehab Tracker at Free against DoubleTime Timer's $0.99. ACL Rehab Tracker also leads on ratings volume (18 vs 3). DoubleTime Timer's advantage is rating (5.0 vs 4.6) and chart position (#190 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ACL Rehab Tracker is free to download; DoubleTime Timer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DoubleTime Timer holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ACL Rehab Tracker has 18 ratings behind it against 3, so its average is the more settled of the two.

## The numbers

| Metric | ACL Rehab Tracker | DoubleTime Timer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.6 (18 ratings)](https://appshunter.io/ios/app/acl-rehab-tracker/id6758809797/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/doubletime-timer/id6763470126/reviews)** |
| Number of ratings | **18** | 3 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#190** |
| Size | 60 MB | 4 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Twin Tip Solutions LLC](https://appshunter.io/developer/1813519780) | [Eric Diaz](https://appshunter.io/developer/1895328088) |

## What reviewers say

### ACL Rehab Tracker

[App page](https://appshunter.io/ios/app/acl-rehab-tracker/id6758809797)

This app uses AI to measure knee flexion and extension angles from photos, helping you track your ACL rehabilitation progress. Monitor your recovery journey with weekly updates, visual history, and progress charts. It's designed to keep you informed and motivated between physical therapy sessions.

**Highlights:** AI-powered knee angle measurements, Track extension and flexion angles, Weekly progress tracking, Visual history of measurements, Progress charts and graphs, Photo library support

**Features:** macOS Compatibility

**In-app purchases:** none


### DoubleTime Timer

[App page](https://appshunter.io/ios/app/doubletime-timer/id6763470126)

**Currently charting:** #190 Top Paid · Health & Fitness (US App Store)

This app provides a simple yet powerful interval timer with two customizable durations that cycle infinitely. It's perfect for workouts, focus sessions, or any activity requiring repeating time intervals, offering background alerts and Apple Watch support.

**Highlights:** Two customizable timer durations, Infinite cycling of timers, 17 alert sounds and vibration options, Background alerts, Apple Watch companion app, No ads or subscriptions

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ACL Rehab Tracker free?

ACL Rehab Tracker is free to download, with no in-app purchases.

### Is DoubleTime Timer free?

DoubleTime Timer costs $0.99, with no in-app purchases.

### Which has better reviews, ACL Rehab Tracker or DoubleTime Timer?

DoubleTime Timer is rated higher. ACL Rehab Tracker averages 4.6 out of 5 from 18 ratings, while DoubleTime Timer averages 5.0 from 3 ratings.

### Do ACL Rehab Tracker or DoubleTime Timer have ads?

Neither ACL Rehab Tracker nor DoubleTime Timer shows ads.

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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.*