Stress Tracker HRV vs LockIN

Stress tracking with HRV, sleep insights & recovery in one simple app. Feel tired, anxious, or burned out without knowing why? This app gives you answers, not guesses. Stress Tracker uses Heart Rate Variability (HRV) to show your real stress level, sleep quality, and how well you’re recovering — all from your Apple Watch. Track your daily stress instantly. See how it changes across the day or week. Know when to rest, recover, or push forward with data-backed clarity. Features: • Real‑time stress tracking based on HRV • Daily & weekly stress trends • Recovery Index to see how you bounce back • Sleep score and insights to optimize rest • Fully private – nothing leaves your device Get clarity over your mental and physical health. Stop guessing. Start tracking.

Premium unlocks two studio coach voices and the monthly health report. Everything needed to train — heart-rate coaching, plans, the field test, progress — is free. Heart rate requires an Apple Watch. On the Simulator or an iPhone without a paired watch, the run screen will wait for a heart-rate source. There is no account system, no sign-in, and no server. Nothing in the app is gated behind an identity, so no demo credentials are needed. HEALTHKIT HealthKit data is never uploaded to a server — LockIN has no backend and no network path for it. Heart rate, workouts, and routes are read from and written to HealthKit on the device; training data is stored locally in SwiftData. No HealthKit data is shared with third parties, sold, or used for advertising. The app's one third-party SDK is Sentry, for crash reporting, and it never receives HealthKit data: sendDefaultPii, attachScreenshot and attachViewHierarchy are disabled and tracing is zero, because a crash screenshot of the run screen would itself be heart-rate data. PERMISSIONS The Health and Apple Music screens explain why access is wanted and then always present the system permission sheet. Declining is available on Apple's own sheet; onboarding completes either way.