TrueZone vs BioSteer
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
TrueZone
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The future of fitness testing. TrueZone offers quick-and-easy, gold-standard fitness testing for coaches or individuals, requiring only a heart rate monitor.
BioSteer
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BioSteer combines molecular and physical medical exams to determine your biological age and aging pace. Routine measurements of biological age give you the ability to understand how your lifestyle affects your biological age, and has the added benefit of efficient preventative medicine and a longer health span. Disclaimer: The information provided by BioSteer is for general informational purposes only. All information in the app is provided in good faith, however, we make no representation or warranty of any kind, express or implied, regarding the accuracy, adequacy, validity, reliability, availability, or completeness of any information in the app. Under no circumstance shall we have any liability to you for any loss or damage of any kind incurred as a result of the use of the app or reliance on any information provided in the app. Your use of the app and your reliance on any information in the app is solely at your own risk. This app does not offer medical advice. The content provided through BioSteer is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in this app.
Screenshots
Verdict
The clearest difference is in-app purchases: BioSteer at none against TrueZone's 2. On price, update cadence, ads and device support 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. TrueZone sells 2 one-off in-app purchases. BioSteer asks for nothing beyond the download.
TrueZone ships an update every 3 weeks, BioSteer monthly. The most recent releases landed on May 16, 2026 and September 17, 2026 respectively.
| Parameter | TrueZone | BioSteer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks โ better | Monthly |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 14.0 |
| Further details โ not scored | ||
| Size | 72 MB | 77 MB |
| Age rating | 4+ | 17+ |
| Developer | Driftline ehf. | CENTARIX BIOTECH LTD |
In-app purchases
TrueZone
- Heart rate analysis$5.99
- 10 fitness tests$49.99
BioSteer
No in-app purchases









