Modus Research vs Submax
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Modus Research
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Modus RE is designed for use with the StepWatch activity monitor. Learn more at https://modushealth.com/
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: Modus Research at none against Submax's 1. Modus Research also leads on iOS requirement (12.0 vs 15.6). Submax's advantage is update cadence (every 2 days vs every 7 months) and device support (3 vs 1). On price and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Submax sells 1 in-app purchase, starting at $3.99 per year. Modus Research asks for nothing beyond the download.
Modus Research ships an update every 7 months, Submax every 2 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.
| Parameter | Modus Research | Submax |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 73 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Modus Health Llc | The University of Kansas |
In-app purchases
Modus Research
No in-app purchases
Submax
- TBRS Submax Yearly Subscription$3.991 Year
