My Bio Age vs RayLimit

My Bio Age turns your Apple Health data into clear, actionable biological age insights, all computed on your device. Now with an on-device AI Coach that answers your health questions using local artificial intelligence. Your comprehensive MyBioAge Index™ combines 12 core health metrics; VO₂max, HRV, Recovery Capacity, Resting HR, Walking HR, Sleep Duration & Regularity, Active Energy, and more; into a single biological age score. Every Monday morning, you'll get an in-app digest highlighting what changed and why. Premium iOS 26 design, elegant charts, and privacy by default. On-device AI Coach - Ask questions about your health data and get instant, personalized insights powered by AI running entirely on your iPhone. No servers, no cloud, complete privacy. Ask "What's my current VO₂max?", "Why did my HRV drop?", "How can I improve sleep?", or "What changed this week?" and get natural, easy-to-understand answers based on your actual health history. Know your biological age - MyBioAge Index™ combines 12 scientifically-weighted health metrics to give you a comprehensive biological age estimate based on your actual health data. Key Metrics Dashboard - Four essential metrics displayed in an elegant visualization: Recovery Capacity (cardiovascular recovery readiness), Training Load (activity balance with zone indicators), Stress Resilience (how well your body handles stress), and Circadian Alignment (daily rhythm health). Tap any metric for detailed breakdowns showing exactly what's driving each score. Apple Watch companion - Glanceable bio age on your wrist. Monday morning insights - A clean, in-app digest arrives every Monday at 10 AM, summarizing Mon-Sun changes and top drivers (e.g., "↑ HRV," "↓ Sleep"). Reasons, not just numbers - See which metrics moved your biological age up or down so you can act with confidence. The AI Chat Assistant can explain why changes happened and what actions to take. Advanced precision - Track Blood Pressure with an external monitor for enhanced accuracy. BP adds 10% additional weight when available—purely additive, no penalty if not tracked. Pacemaker support - Specialized mode for pacemaker users that excludes fixed HRV values and intelligently redistributes weight to other cardiovascular metrics. Pace of aging - Track how fast you're aging relative to chronological time with 12-week comparisons and 24-week rolling averages. Full-fidelity charts - Beautiful, scrollable charts for VO₂max, HRV (SDNN), Resting HR, Walking HR, Sleep, Recovery Capacity, and more straight from Apple Health. Privacy-maximal - All data and AI processing stays on your device. Zero servers, zero cloud storage, zero analytics. Your health conversations never leave your iPhone. You control everything. What's included On-device AI Coach with templated health questions Choose between Llama 3.2 3B or Llama 3.1 8B models MyBioAge Index™ combining 12 core health metrics Key Metrics Dashboard with Recovery Ring, Training Load, Stress Resilience, and Circadian Alignment Detailed Recovery Signals and Strain Signals breakdowns Stress Resilience scoring with HRV patterns, recovery trends, and sleep quality analysis Circadian Alignment tracking with sleep timing, wake patterns, and activity rhythm analysis Training Load visualization with zone indicators and colored trend charts Apple Watch app with all key metrics synced to your wrist Pace of Aging tracking with 12-week and 24-week trends Optional Blood Pressure support for enhanced precision Pacemaker-adjusted mode Pregnancy-adjusted mode Monday morning digest notifications with positive/negative drivers Metric detail screens with 24-week trends and baselines 100% on-device AI and scoring; granular Health permissions Metric and Imperial measurement systems Requirements: iPhone running iOS 26+ with at least 2GB free storage for AI features. Important: My Bio Age is for wellness and fitness purposes only. It does not diagnose, treat, or provide medical advice.

Whether you want a natural golden tan, need to hit your daily vitamin D goals, or just want to get outside safely — RayLimit tells you exactly how long to stay in the sun, based on science. KEY FEATURES: SMART SUN TIMER Start a session and RayLimit counts down your safe exposure window in real time. Get notified before you burn — not after. SUNSCREEN SCANNER Scan your sunscreen or tanning oil to instantly analyze its ingredients. RayLimit highlights potential risks, flags harmful or controversial components, and helps you make safer choices for your skin. PERSONALIZED TO YOUR SKIN Input your skin type, existing tan level, and current UV index. RayLimit calculates your personal burn time and vitamin D production — no guesswork. UV INDEX MONITORING See real-time UV conditions for your location. Know exactly when the sun is strong enough to matter — and when it's time to seek shade. VITAMIN D TRACKER Track daily vitamin D from sun sessions and supplements. See your running total and know when you've hit your healthy daily target. TANNING ROUTINES Pick from built-in routines like “Quick Flip” or “Shade Break,” or create your own step‑by‑step routine. Get timed cues for flips, sides, and breaks so your tan develops evenly and safely. SMART REMINDERS Get alerts to flip, reapply sunscreen, or wrap up your session — all timed to your session, not just a generic clock. SESSION HISTORY Review past sun sessions, track your tanning progress, and build smarter habits over time. WHO IT'S FOR → Tanners who want color without the burn → Health-conscious people monitoring vitamin D levels → Outdoor lovers: hikers, runners, beach-goers → Anyone recovering from vitamin D deficiency PRIVACY FIRST Your data stays on your device. No account required to get started. Download RayLimit free and take control of your sun time — safely, smartly, and on your terms. Disclaimer: RayLimit is for informational purposes only and is not a substitute for medical advice. Always consult a healthcare professional