# Control Physical Therapy vs OpenBook

The clearest difference is in-app purchases: Control Physical Therapy at none against OpenBook's 2. Control Physical Therapy also leads on ads (none vs shown). OpenBook's advantage is update cadence (every 2 weeks vs every 10 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. OpenBook sells 2 in-app purchases, starting at $3.99 per month. Control Physical Therapy asks for nothing beyond the download.

Control Physical Therapy ships an update every 10 months, OpenBook every 2 weeks. Both last shipped on September 29, 2026.

## The numbers

| Metric | Control Physical Therapy | OpenBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 2 weeks** |
| Size | 43 MB | 55 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [GMcLarty Enterprises, LLC](https://appshunter.io/developer/1767645277) | [OpenArcX Pty Ltd](https://appshunter.io/developer/1870700465) |

## What reviewers say

### Control Physical Therapy

[App page](https://appshunter.io/ios/app/control-physical-therapy/id6670797060)

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenBook

[App page](https://appshunter.io/ios/app/openbook-workout-tracker/id6758069172)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenBook Full Access - Monthly | $3.99 | per month |
| OpenBook Full Access - Yearly | $29.99 | per year |


## Frequently asked questions

### Is Control Physical Therapy free?

Control Physical Therapy is free to download, with no in-app purchases.

### Is OpenBook free?

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

### Do Control Physical Therapy or OpenBook have ads?

OpenBook shows ads; Control Physical Therapy does not.

### Which is updated more often, Control Physical Therapy or OpenBook?

Control Physical Therapy ships an update every 10 months, and OpenBook every 2 weeks. Most recently, Control Physical Therapy was updated on September 29, 2026 and OpenBook on September 29, 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.*