# GAP-FLEX® — Knee Recovery Made Simple

> App for gravity-based knee recovery therapy device with progress tracking. (iPhone/iPad app by GAP-FLEX®.)

- Source: https://appshunter.io/ios/app/gap-flex/id1451112516 (this page in markdown: same URL + `.md`)
- Developer: [GAP-FLEX®](https://appshunter.io/developer/1451112515)
- Category: Medical, Health & Fitness
- Price: Free
- Rating: 1.50/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 12+
- Requires: iOS 10.0 · 96 MB
- Languages: American English
- Released: 2019-05-29
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/gap-flex/id1451112516/reviews.md

## What is GAP?

The GAP-FLEX® System is the next generation of knee recovery therapy. Designed to utilize gravity and save you time (and money) in lengthy therapy sessions, the GAP-FLEX® System increases range of motion faster during recovery from total knee replacement. Purchase your device at GAP-FLEX.com. 

The GAP-FLEX® App is designed to be used in accompaniment with the device during recovery. App features include: 
- Getting to know your GAP-FLEX® 
- Setup instructions and animated demonstrations 
- Therapy instructions, timer and log for tracking progress 
- Recommended optional exercises

## Key features

- Setup instructions
- Animated demonstrations
- Therapy timer
- Progress tracking
- Recommended exercises

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/gap-flex/id1451112516/reviews.md

### 1/5 — Doesn’t work

*2024-12-16, version 1.1*

Doesn’t record the treatment sessions, which is the whole point of the app!

### 2/5 — Bug issues

*2022-08-09, version 1.1*

I’ve been using this app for about 5 days now and it seems to help only with keeping time and letting me know to begin the next session. 

The notifications do not work and it doesn’t accurately report the amount of sessions I perform on a daily basis. This needs to be fixed with an update.

## Frequently asked questions about GAP

### What is GAP-FLEX®?

GAP-FLEX® is a system designed for knee recovery therapy that utilizes gravity to help increase range of motion faster after total knee replacement. The accompanying app provides guidance and tracking for its use.

### How does GAP-FLEX® help with knee recovery?

The system is designed to save time and money compared to lengthy therapy sessions. It aims to increase range of motion more quickly during recovery from total knee replacement.

### Where can I purchase the GAP-FLEX® device?

The GAP-FLEX® device can be purchased directly from their official website at GAP-FLEX.com.

### What features does the GAP-FLEX® app offer?

The app includes instructions on getting to know the device, setup guidance with animated demonstrations, therapy timers, progress logging, and recommended optional exercises.

### What is the age rating for GAP-FLEX®?

GAP-FLEX® has an age rating of 12+, making it suitable for users in that age group and older.

### On which devices can I use GAP-FLEX®?

The GAP-FLEX® app is supported on iPhone and iPod devices.

### How often is GAP-FLEX® updated?

The latest version of GAP-FLEX® is 1.1, which was last updated on March 19, 2020. This indicates infrequent updates.

### Does GAP-FLEX® have ads?

No, the GAP-FLEX® app does not contain advertisements.

## Version history (last 2 releases)

### 1.1 — 2020-03-19

Minor updates and bug fixes.

### 1.0 — 2019-05-29

No release notes.

## Apps similar to GAP

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [TracPatch Knee HCP](https://appshunter.io/ios/app/tracpatch-knee-hcp/id1434767855) | — | Free | Medical |
| [myHip&Knee](https://appshunter.io/ios/app/myhip-and-knee/id1005212811) | 5.0 (1) | Free | Medical |
| [Physical Therapy: ACL & Knee](https://appshunter.io/ios/app/physical-therapy-acl-and-knee/id1477712207) | 4.4 (151) | Free | Medical |
| [WashU Knee/Hip Studies](https://appshunter.io/ios/app/washu-kneehip-studies/id1437173114) | 5.0 (3) | Free | Medical |
| [TracPatch Knee](https://appshunter.io/ios/app/tracpatch-knee/id1438219554) | 4.3 (9) | Free | Medical |
| [Radian by Globus Medical](https://appshunter.io/ios/app/radian-by-globus-medical/id1660326595) | — | Free | Medical |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*