Rethink Physical Therapy vs Submax
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Rethink Physical Therapy
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Welcome to the Rethink Physical Therapy App! Log on to access your personalized Home Exercise Program on your mobile device. Using this app, you can access your personalized Home Exercise Program with HD Instructional videos. On the 'Messages' tab, you can securely communicate with your Rethink Physical Therapy provider. As you complete your exercises, we'll give you trophies and medals to celebrate your progress! On the 'Awards' tab, you can track these items. Prefer a language other than English? Go to the 'More' tab and select 'Languages' to pick another language option. If you need to book an appointment, please go to the 'Appointments' tab for more info. Make sure to select 'Mark as Complete' when doing your exercises to ensure that your provider can keep track of your progress! You must be a Rethink Physical Therapy patient to gain access. This app integrates with your iPhone's Health app to read daily step count data allowing your provider to monitor your activity.
Submax
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The TBRS Submax App is an evidence-based tool designed to simplify administration of the Total Body Recumbent Stepper (TBRS) Submaximal Exercise Test. The app guides users through the testing protocol, captures test data in real time, and automatically calculates estimated aerobic fitness to support individualized exercise prescription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ TBRS Submax is a data-recording and calculation tool intended for use by qualified exercise and health professionals. It does not measure, diagnose, or treat any medical condition, and its estimates are not a substitute for professional medical advice. Always consult a physician before beginning an exercise program or making any medical decision.
Screenshots
Verdict
The clearest difference is in-app purchases: Rethink Physical Therapy at none against Submax's 1. Submax's advantage is update cadence (every 2 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Submax sells 1 in-app purchase, starting at $3.99 per year. Rethink Physical Therapy asks for nothing beyond the download.
Rethink Physical Therapy ships an update every 6 months, Submax every 2 days. Both last shipped on October 6, 2026.
| Parameter | Rethink Physical Therapy | Submax |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 โ better | 15.6 |
| Further details โ not scored | ||
| Size | 43 MB | 24 MB |
| Age rating | 12+ | 4+ |
| Developer | Rethink Physical Therapy, PLLC | The University of Kansas |
In-app purchases
Rethink Physical Therapy
No in-app purchases
Submax
- TBRS Submax Yearly Subscription$3.991 Year
Questions
Is Rethink Physical Therapy free?
Is Submax free?
Do Rethink Physical Therapy or Submax have ads?
Which is updated more often, Rethink Physical Therapy or Submax?
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