Bars vs LifeOS

Track your eating and fasting windows on a visual timeline. See your days at a glance, spot patterns, and build better habits. No accounts, no servers, no nonsense. SIMPLE BY DESIGN Most fasting apps bury you in calorie counts, meal logs, streak guilt, premium plans and articles. Bars does one thing well: it shows when you eat and when you don't. Tap to start, tap to stop. That's it. YOUR DATA STAYS YOURS No accounts. No servers. No tracking. No data collection. Everything syncs through your private iCloud. Only you can see it. 100% free. No paywalls. No subscription. No hidden costs. SEE THE FULL PICTURE Connect Apple HealthKit to overlay sleep and workouts on your daily timeline. See how your eating window lines up with recovery, training, and rest without switching between apps. BUILT FOR Biohackers, intermittent fasters, health conscious professionals, habit builders, and anyone curious about how meal timing affects how they feel. HOW IT WORKS Tap to open your eating window Tap to close it Watch your days stack up on a clean visual timeline Optional: Connect HealthKit to layer in sleep and workout data WORKS WITH LONGEVITYDECK If you use LongevityDeck, Bars can sync your eating windows directly to your protocol timeline. See fasting alongside every other protocol you track. All in one place. Both apps are free. IMPORTANT: This app is for informational and educational purposes only. Always consult with your doctor or qualified healthcare provider before making any medical decisions or changes to your health routine.

Start free. LifeOS is your AI Longevity Coach — helping you improve healthspan through smarter meals, personalized daily guidance, and future habit simulations. Powered by your wearable data — steps, heart rate, HRV, and sleep — LifeOS turns daily signals into coaching that adapts to you over time. FEATURES NutriScan Take a photo of any meal and get instant wellness coaching on nutrition quality, longevity impact, and how it fits your daily plan. What-If Simulator Explore 30-day scenarios like better sleep, more movement, or new eating habits and see how small changes may compound over time. Life Stack Receive personalized nutrition, exercise, supplement, and recovery actions based on your biometrics and goals. Vitality Score Track your daily wellness momentum with one simple score built from your lifestyle signals. Twin History See how your vitality trends and biological age estimate evolve over time. Weekly Intelligence Get AI-powered weekly summaries showing progress, changes, and what to focus on next. PREMIUM Start free. Upgrade for deeper insights, expanded history, advanced NutriScan analysis, and more personalized coaching tools. DISCLAIMER LifeOS is a wellness coaching tool. All insights are for informational purposes only and are not medical advice. TERMS OF USE Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/