NoStress reads heart rate variability (HRV), resting heart rate, SpO2, sleep and respiratory rate from Apple Health, then shows your real-time stress level in one clean dashboard.
NoStress turns the biometric data your Apple Watch (or any device that syncs to Apple Health) already collects into a simple stress score. It watches HRV alongside resting heart rate, SpO2, sleep duration, respiratory rate and step count, then charts daily, weekly and monthly trends so you can see what's actually driving your stress up or down. If you also wear a Fitbit, NoStress merges its data — synced into Apple Health through the Google Health app — with your Apple Watch data instead of double-counting steps or heart rate.
Who it's for
Anyone who already tracks heart-rate or sleep data on an Apple Watch or Fitbit and wants a clearer read on day-to-day stress and recovery, without learning a new platform or account. NoStress is not a medical device — it displays biometric data for informational purposes only and does not diagnose or treat any condition; always consult a healthcare professional for medical concerns.
Key features
Real-time stress level display
HRV and resting heart rate tracking
SpO2 and respiratory rate monitoring
Sleep duration analysis
Step counter and daily overview dashboard
Weekly and monthly trend charts
Automatic Fitbit + Apple Watch data merge (no double-counting)
Pricing
Free to download. A Premium subscription unlocks the full dashboard and history for $9.99/month, billed through the App Store.
Frequently asked questions
Does NoStress work with Fitbit?
Yes. Sync Fitbit data into Apple Health through the Google Health app, and NoStress merges it with any Apple Watch data instead of counting the same steps or heart rate twice.
What health metrics does NoStress track?
HRV, resting heart rate, SpO2, sleep duration, respiratory rate and step count — all read from Apple Health with your permission.
Is NoStress a medical device or diagnostic tool?
No. It displays biometric data for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment.
How much does NoStress cost, and is there a free trial?
The app is free to download. The Premium subscription is $9.99/month with no free trial currently offered.
Do I need an Apple Watch to use NoStress?
No — any device that syncs HRV, heart rate, sleep or SpO2 data into Apple Health works, including Apple Watch and Fitbit.
Where can I read NoStress's privacy policy and terms?