Stress Meter Pro:

HRV & AI Stress Coach

Only for iPhone

Free · In‑App Purchases

iPhone

Accurately measure stress via your camera. Train your nervous system with live biofeedback and discover patterns with the AI Coach. Now with smart auto lens detection! Are you on the verge of burnout, or do you want to optimize your sports performance? Your heart rate tells the story. With Stress Meter Pro, you measure the activity of your nervous system (Heart Rate Variability or HRV) with clinical precision, without the need for an expensive smartwatch or heart rate strap. Your smartphone camera is all you need. BASED ON A PROVEN METHOD The insights and the AI Coach in this app are partly based on the successful theory and practice from the book "Frustraties de Baas" by Heleen. The app translates this powerful theory into directly measurable results and daily coaching in your pocket. WHY STRESS METER PRO? Unlike standard trackers that only tell you how you slept after the fact, our app looks ahead. The built-in Stress Coach combines your HRV measurements with Apple Health data (sleep and steps) and your own journal labels to proactively warn you of energy dips. KEY FEATURES: NO HARDWARE NEEDED Measure your heart rate (BPM) and HRV (RMSSD & SDNN) accurately by simply placing your fingertip on your phone's camera for 60 seconds. PREDICTIVE COACH Get a Morning Readiness report and see exactly when your optimal focus window is, and when to expect an energy dip. DISCOVER YOUR PATTERNS Label your measurements (e.g., Coffee, Bad sleep, Work stress) and discover via the interactive heatmap which habits sabotage your recovery the most. LIVE BIOFEEDBACK BREATHING Train your nervous system with breathing exercises (like Coherence and Box Breathing) and see your heart rate drop and stress disappear live on your screen. EXPORT PDF REPORTS (PRO) Generate a professional report of your trends with one tap and share it securely with your doctor, therapist, or personal trainer. DEEP HEALTH SYNC Seamlessly connect with Apple Health to automatically include sleep and activity data in the analyses. PRIVACY FIRST (100% LOCAL) Your health data is extremely private. All measurements and images are processed locally on your phone. No photos or videos are stored, and you don't need an account to use the app. Disclaimer: Stress Meter Pro is designed for wellness and fitness purposes and is not a medical device. Always consult a doctor for health complaints. Privacy Policy: https://www.frustratiesdebaas.com/app-support Terms of Use (Standard Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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Thank you for using Stress Meter Pro! In this update, we've made measuring your heart rate even more seamless based on your early feedback: • Smart Auto-Detect: Using an iPhone with multiple lenses (like the Pro models)? The app now automatically searches for the best lens for your heart rate measurement. No manual selection needed! • Smoother Onboarding: The initial calibration process is now faster and more intuitive for new users. • Cleaner UI: If you do want to select a lens manually, the app now displays clean, easy-to-understand names (like "Front", "Back", or "Ultra Wide"). • Various under-the-hood performance improvements and bug fixes. Keep the feedback coming, we read it all! Happy tracking.

Version 1.0.1

The developer, Heleen Elfrink, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Heleen Elfrink
    Size
    • 176 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    Languages
    • English
    Age Rating
    9+
    In-App Purchases
    Yes
    • Stress Check Pro (Lifetime) $49.99
    • Stress Check Pro (Yearly) $24.99
    • Stress Check Pro (Monthly) $3.99
    • Learn More
    Copyright
    • © 2026 Heleen Elfrink
  • Developer Website
  • Privacy Policy

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