Comparison

Rethink Physical Therapy vs Submax

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Rethink Physical Therapy

Features
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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.

About

Submax

Features
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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

Rethink Physical Therapy4 screens
Submax4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

Rethink Physical Therapy ships an update every 6 months, Submax every 2 days. Both last shipped on October 6, 2026.

Scorecard2 real differences ยท 4 level
Rethink Physical Therapy versus Submax: the parameters behind the verdict, then further details
ParameterRethink Physical TherapySubmax
PriceFreeFree
Update frequencyEvery 6 monthsEvery 2 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.1 โ€” better15.6
Further details โ€” not scored
Size43 MB24 MB
Age rating12+4+
DeveloperRethink Physical Therapy, PLLCThe University of Kansas

In-app purchases

None

Rethink Physical Therapy

No in-app purchases

1 purchases

Submax

Subscriptions1
  • TBRS Submax Yearly Subscription$3.991 Year

Questions

Is Rethink Physical Therapy free?
Rethink Physical Therapy is free to download, with no in-app purchases.
Is Submax free?
Submax is free to download, with in-app purchases available.
Do Rethink Physical Therapy or Submax have ads?
Neither Rethink Physical Therapy nor Submax shows ads.
Which is updated more often, Rethink Physical Therapy or Submax?
Rethink Physical Therapy ships an update every 6 months, and Submax every 2 days. Most recently, Rethink Physical Therapy was updated on October 6, 2026 and Submax on October 6, 2026.

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