TrueZone vs HRV Stress Tracker
Price, ratings, monetisation and update history for both apps, side by side — 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.
HRV Stress Tracker
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Make sense of your heart rate variability with NoStress. View an estimated stress level based on HRV alongside the health readings available from your connected sources. Use a compatible band you already own through Apple Health or Google Health, without a subscription from the band maker. Available readings depend on your device and data source. • HRV, heart rate and resting heart rate. • Sleep duration, blood oxygen, respiratory rate and steps when your source supplies them. • A daily overview and historical charts to compare changes over time. • Apple Health and optional Google Health sync for supported data. • Apple Watch views and widgets for a quick glance. NoStress reads recorded health data; it does not measure HRV with the phone camera. A compatible wearable or another source of HRV data is needed for stress estimates. Metric availability and update frequency depend on the source and the permissions you grant. For general wellbeing and information only. Stress estimates are not a diagnosis, medical advice or a treatment recommendation. Icons8: https://icons8.com NoStress Pro is an auto-renewing subscription: $9.99 per month, or $59.99 per year, each with a 3-day free trial for new subscribers. Payment is charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless it is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription anytime in your Apple ID account settings after purchase. Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Manage subscriptions: https://apps.apple.com/account/subscriptions Terms of Use: https://resrom.com/projects/nostress/terms — Privacy Policy: https://resrom.com/projects/nostress/privacy
Screenshots
Verdict
The clearest difference is update cadence: HRV Stress Tracker at weekly against TrueZone's every 3 weeks. TrueZone's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases and device support 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. TrueZone sells 2 one-off in-app purchases and HRV Stress Tracker sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
TrueZone ships an update every 3 weeks, HRV Stress Tracker weekly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.
| Parameter | TrueZone | HRV Stress Tracker |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 72 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Driftline ehf. | Leonid Resenchuk |
In-app purchases
TrueZone
- Heart rate analysis$5.99
- 10 fitness tests$49.99
HRV Stress Tracker
- Unlimited Premium3 Days trial$9.991 Month
- Unlimited Premium Yearly3 Days trial$59.991 Year
