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) is 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 is happening inside your body as the hours pass, with the research behind it. As you fast, SOL guides you through eight phases: Fed State, Insulin Dropping, Fat Burning, Ketosis, Autophagy, Deep Autophagy, Growth Hormone Surge and Immune Reset. FEATURES • A calm timer with a progress ring and phase markers • Your fast on the lock screen and in the Dynamic Island • All 8 phases explained, with links to the published studies • A goal dial from 12 to 72 hours, or an open fast with no limit • Started earlier? Set the time you last ate, and correct it later • Switch the timer between time elapsed and time to go • A daily reminder to start your fast • Your Journey: stats, streaks, a 7 day view and your history • Edit, add or delete past fasts • Guidance on breaking your fast gently • Home screen widget • "Start my fast" with Siri • Share your results with a beautiful card • Light and dark mode with handcrafted watercolor textures FASTING TOGETHER If you like, join the live count of people fasting right now. It is optional, anonymous and off until you turn it on. YOUR DATA No account, no ads, no tracking. Your fasting data stays on your device unless you choose to join the community count or turn on iCloud backup. DESIGNED WITH INTENTION SOL is inspired by the simplicity of nature. No clutter and no paywall. Just you, your fast, and a clearer picture of what your body is doing. SOL is free. If you enjoy it, you can leave a tip. ABOUT THE SCIENCE Phase information is based on peer-reviewed research, with direct links to the sources. Some findings come from animal studies, and every body responds differently. SOL offers general wellness information and is not medical advice. Please talk to a doctor before fasting, especially for longer fasts. Begin your fast. Know your body. Grow like the pine.