BodyInsights: Longevity Buddy

Hey everyone! I'm Justin, maker of BodyInsights, and I'm pumped to share what we've been building for the past two years. The Problem: Your Apple Watch collects incredible health data—HRV, resting heart rate, sleep stages, VO2max, skin temperature—but it's just numbers sitting in Apple Health with zero context. You're left wondering: "Am I recovered enough to train hard today?" "Why do I feel exhausted even after 8 hours of sleep?" "Is my body trying to tell me something?" I was drowning in metrics with no clue what to actually DO with them. The Insight: I started tracking patterns manually. My resting heart rate would creep up 3 days before getting sick. My HRV predicted whether a workout would feel amazing or destroy me. My overnight heart rate stayed elevated in hotels even when I "slept" 8 hours—my body never recovered. These patterns were invisible until I connected the dots. The Solution: BodyInsights is the brain your Apple Watch never had. It turns raw sensor data into a complete longevity and performance system: Fitness Age – See your biological age vs chronological age based on VO2max, heart rate trends, and activity. Watch it drop as you train smarter. It's the most motivating metric we've built—nothing hits harder than seeing you're biologically younger than your actual age. Body Battery – Real-time energy reserves so you know when to push and when to rest. Watch it recharge with quality sleep, drain with stress and tough workouts. Sleep Score – One number that blends duration, stages, heart rate, HRV, and temperature to show how recovered you actually are, plus what helped or hurt. Stress Score & Balance – Maps your day into high-stress, balanced, and restorative windows. Spot triggers (meetings, commuting, late screens) and see your calm vs stressed ratio. Personalized Recovery Time – After every workout, get a clear recovery window based on intensity, sleep quality, and current stress—not generic "rest 48 hours" advice. Wellness Alerts – Catch when your baselines drift before you're actually sick or burnt out. Training That Lasts – Zone 2 tracking, max HR monitoring, and smart easy/hard mix to build durable fitness without redlining yourself constantly. Daily Dashboard – One screen that answers: "Should I go hard today or take it easy?" The Philosophy: Your Apple Watch is world-class hardware. BodyInsights gives it the context it's missing. No logins. No data leaves your device. Core features free because we built this for ourselves first. What We Just Shipped: Dark mode, oxygen saturation trends, better sleep timelines, improved VO2max rankings for accurate Fitness Age calculations. What's Next: We're actively building based on community feedback: Native Watch app Sleep apnea detection Manual max HR input for better training zones Disable vibrations option Improved VO2max calculations for HIIT training Celsius/Fahrenheit toggles Choice between calculated vs Apple VO2max for Fitness Age Weekly health assessments Exportable health reports for doctors Why Now: We've been refining this with real users for months. The feedback has been incredible—people are training smarter, sleeping better, catching burnout before it hits, and watching their Fitness Age drop. Now we want to bring it to the Product Hunt community and hear what you think. Ask Me Anything: How the metrics work, the science behind the insights, what's coming next, or just health optimization in general. I'm here all day. Thanks for checking it out! 🙏