Kona Flux: Stress Tracker

Kona Flux is your Apple Watch companion for tracking Body Energy and Body Stress. Powered by our in-house Body Energy algorithm, Kona Flux helps you understand your current energy, recovery, energy use, and stress—making daily body data clearer and easier to read. It also supports Heart Rate, Steps, Ambient Light, Environmental Volume, and more. Now you can measure Heart Rate with your iPhone's rear camera and flash—no Apple Watch required. Apple Watch faces and iPhone widgets put your Body Energy and Body Stress within easy reach. ○ Body Energy: Recovery and Use Our in-house algorithm presents three clear metrics: — Body Energy: your current energy level — Energy Recovery: energy regained today — Energy Used: energy used today Together, they show how energy recovers and is used throughout your day, rather than just one isolated percentage. *Body Energy and Energy Recovery require data from a compatible wearable device. ○ Body Stress Kona Flux uses relevant Apple Watch health data, including Heart Rate Variability (HRV), to calculate and display your current Body Stress. Clear readings and status indicators make your stress level easier to understand. Some Apple Watch Body Stress watch faces also display HRV values alongside your stress status. ○ Heart Rate: No Apple Watch Needed Use your iPhone's rear camera and flash to measure Heart Rate without an additional wearable device. Open the Heart Rate detail page, gently cover the rear main camera with your finger, and hold still as instructed to view your measurement result. ○ Intuitive Status Messages Dynamic visuals and short status messages make selected readings easier to understand. ○ More Data to Explore View Steps, Barometric Pressure, Elevation Gain, Magnetic Field, Ambient Light, Environmental Volume, and more. Some data includes history and charts. Home screen data cards can be reordered. ○ Core Features Are Free Use all supported iPhone data and detail pages without a subscription, including Body Energy, Body Stress, Heart Rate measurement, and available trends and charts. ○ Premium: Watch Faces & Widgets — Apple Watch Body Stress watch faces — Apple Watch Body Energy watch faces — iPhone Body Stress widgets — iPhone Body Energy widgets Check Body Energy and Body Stress without opening the app. ○ Subscription Pricing — 7-day free trial for first-time subscribers — Monthly: $4.99/month — Yearly: $24.99/year ○ Privacy & Data Security Kona Flux accesses health, location, motion, fitness, microphone, and camera data only with your permission. Relevant data is read or processed locally through native system APIs for in-app calculations and display. The rear camera and flash are used only when you actively measure Heart Rate. No photos or videos are taken, saved, or uploaded. We do not upload or sell your sensor data or use it for advertising, marketing, or behavioral analysis. ○ Disclaimer Kona Flux is not a medical device or diagnostic tool and does not provide health advice, diagnosis, or treatment. Body Energy, Body Stress, Heart Rate, and other data are for personal viewing and tracking only, not medical decisions. Consult a qualified healthcare professional if you have health concerns. ○ Auto-Renewable Subscription — Payment: Your Apple Account is charged when you confirm your purchase. — Renewal: Your Apple Account is charged within 24 hours before the current period ends. The subscription then renews automatically. — Cancellation: On iPhone, open Settings → your name → Subscriptions → Kona Flux to cancel. Turn off auto-renewal at least 24 hours before the current period ends to avoid renewal. ○ Privacy Policy: https://www.exprekona.com/konaflux/api/app/apple/html/agreement/privacy?lang=en-US ○ Terms of Service: https://www.exprekona.com/konaflux/api/app/apple/html/agreement/service?lang=en-US