RecoverySync — Recovery Score

RecoverySync turns the data your Apple Watch already collects while you sleep into one simple recovery score — every morning, on your wrist. WHY RECOVERYSYNC • One-time purchase. No subscription, ever. • 100% on-device. Your health data never leaves your iPhone. • No account, no email, no tracking. • Built with only Apple's native frameworks — zero third-party SDKs. HOW IT WORKS Each morning, RecoverySync reads three signals from Apple Health: • Heart Rate Variability (SDNN) — 50% of your score • Resting Heart Rate — 30% of your score • Sleep Duration — 20% of your score HRV and resting heart rate are compared against your personal 28-day baseline, and sleep against your own goal, to produce a clear daily score from 0 to 100: • HIGH (76-100): Your body is ready to push. • MODERATE (51-75): Train mindfully — listen to your body. • LOW (0-50): Prioritize rest and recovery today. You can adjust the weighting of each metric to match your training style. RecoverySync also turns your score into action: a daily training-intensity recommendation and tonight's sleep target, based on your recent sleep debt. WHERE YOU'LL SEE IT • iPhone Home Screen widget (small, medium, lock screen) • Apple Watch complication (circular, rectangular, corner) • Apple Watch app • Optional morning notification REQUIREMENTS • iPhone running iOS 17 or later • Apple Watch Series 4 or later running watchOS 10 or later • Apple Watch must be worn while sleeping PRICING The daily recovery score and 7-day trends are free. A single one-time purchase unlocks daily training and sleep targets, 28-day trends, and CSV export. No subscription, no recurring charges. PRIVACY RecoverySync does not collect, transmit, or share any personal data. All recovery scores and preferences are stored on your device using SwiftData. Read-only access to Apple HealthKit, never written back. DISCLAIMER RecoverySync is for general wellness and informational purposes only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making decisions about your health, training, or exercise. QUESTIONS? Email: freetokyo2020@yahoo.co.jp