FastTrak vs SOL

FastTrak is the fasting companion for people who want more than a countdown timer. Start a fast in one tap and follow your progress with live, personalized fasting insights, weight tracking, widgets, and powerful analytics. FastTrak is built for iPhone, integrates with Apple Health, and is designed with privacy in mind. FASTING TIMER - Start a fast in one tap with a beautiful progress ring - Supports 16:8, 18:6, 20:4, OMAD, and custom fasting windows - Edit your start time or goal duration at any time - Weekly ring view shows your last 7 days at a glance LIVE FASTING INSIGHTS - Estimated fat use - Estimated calories used - Estimated glycogen remaining - Money saved based on your grocery cost - Steps taken while fasting - Weight trend over the past week Every estimate is clearly labeled and includes an explanation of how it is calculated. WEIGHT TRACKING - Log weight manually or import from Apple Health - Set a goal weight and see it on your chart - View progress by week, month, or year - Schedule weigh-in reminders on the days you choose APPLE HEALTH INTEGRATION - Reads steps, active energy, body mass, height, date of birth, and biological sex - Uses Mifflin-St Jeor BMR for personalized energy estimates - Syncs weight entries with Apple Health - Keeps your health data on your device WIDGETS FOR HOME & LOCK SCREEN - Progress ring widget for small, medium, circular, rectangular, and inline sizes - Live updates while you are fasting - Activity heatmap widget showing weeks of fasting history (Plus) ANALYTICS WITH FASTTRAK PLUS - 52-week fasting activity heatmap - Weight vs. fasting correlation chart - Weekly fasting hours over 12 weeks - Average fasting duration trend - Cumulative estimated fat use and money saved - Fasting pattern distribution by start and end time - Full fast history DESIGNED FOR PRIVACY FastTrak keeps your fasting history and health data on your iPhone. There are no accounts, no social features, no ads, and no server required to use the app. FastTrak provides wellness estimates only and is not medical advice. Privacy Policy: https://www.bluebry.com/fasttrak/privacy Terms of Use: https://www.bluebry.com/fasttrak/terms

SOL (솔) — Korean for Pine Tree. Like the pine that endures through every season, SOL stands with you through every fast. WHAT MAKES SOL DIFFERENT Most fasting apps just show a timer. SOL shows you what's actually happening inside your body — in real time. As you fast, SOL guides you through each biological phase: Fed State → Insulin Dropping → Fat Burning → Ketosis → Autophagy → Deep Autophagy → Growth Hormone Surge → Immune Reset FEATURES • Beautiful minimal timer with progress ring • Real-time body phase updates with scientific sources • Full body timeline — see all 8 phases and your progress • Tap any phase for in-depth science and PubMed sources • Smart notifications at each milestone • Stats dashboard — track your fasting journey • Background timer — keeps running when you close the app • Light & dark mode with handcrafted watercolor textures • Home screen widget • Community pulse — you're not fasting alone • Share your results with a beautiful card FASTING GOALS Choose from 16h, 18h, 20h, 24h, 36h, 48h, 72h, or go Open with no time limit. Hit your goal? Extend to the next level. DESIGNED WITH INTENTION SOL is inspired by the simplicity of nature. No clutter, no ads, no unnecessary features. Just you, your fast, and the knowledge of what your body is doing. All body phase information is based on peer-reviewed scientific research with direct links to PubMed sources. Begin your fast. Know your body. Grow like the pine.