FastingNation

A coach that already knows how long you fasted, what you ate and how your body is changing. Never explain it twice.

FastingNation is an intermittent fasting app for iPhone. Unlike a simple timer, it estimates which metabolic phase your body is in while you fast, using your own fasting history.

HOW METABOLIC TRACKING WORKS The app follows 6 metabolic phases during a fast (from the fed state through deep ketosis and autophagy), with an estimate of ketones (BHB) and glucose based on elapsed time and your history. These are physiological estimates, not real blood measurements: they do not replace a clinical test.

AI FOOD ANALYSIS Take a photo of your meal and the AI estimates ingredients, calories and macros. You review and correct the result before saving it: the app never stores anything without your confirmation.

AI COACH Talk to the coach about your fasting, your food and your progress. The conversation is saved to your account, stays available even if you change phones, and you can export it whenever you want. It can also look up your body measurements and adjust them if you ask it to. Included in FastingNation Pro.

BODY AND PROGRESS Track your weight and body composition. The guided Body Check-in uses the camera to detect your pose and measure your progress with before/after comparison photos. Includes 38 achievements to keep you motivated.

HYDRATION AND HABITS Over 100 loggable drinks, with recommendations based on the fasting phase you are in, daily streaks and experience levels.

CYCLE AND HEALTH Menstrual cycle tracking integrates with your fasting plan. You can log medical conditions to receive compatibility alerts for your fasting protocol.

APPLE WATCH Real-time sync of heart rate, heart rate variability, activity and your fast in progress, right on your wrist.

ON-DEVICE LEARNING From your 30th fast onward, the app trains a model on your own iPhone using your history: it learns your habits and personalizes its predictions. That model is created on your device and stays there.

PRIVACY Your Apple Health data is processed solely through Apple's framework and never leaves your iPhone for our servers. You can export all your data as CSV or JSON whenever you want, and deleting your account really does remove your information from our servers.

5 FASTING PLANS From 12:12 to get started, through the classic 16:8, to the advanced OMAD (one meal a day). Each plan targets specific metabolic phases.

PLANS The app is free to start, with no ads, and core fasting, food and body features available without paying. FastingNation Pro is an optional subscription that unlocks the AI coach and advanced analytics. Available in 89 languages.

FastingNation is not a medical device and does not provide diagnosis. It does not replace the advice of a health professional. Consult your doctor before starting any fasting protocol, especially prolonged fasts, if you are pregnant, breastfeeding, have a history of eating disorders, diabetes or any other medical condition.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fastingnation.io/en/privacy/