Fasting Center: Fast Tracker

Fasting Center is a fasting timer and tracker for intermittent and extended fasting. Start a fast, watch the ring fill, see which stage your body is in, and keep your numbers in one place.

Fast your way
- Plans from 12:12 to 23:1 (OMAD), extended fasts of 24, 36, 48 and 72 hours, an open fast with no end, or a specific end time
- A live ring that shows time elapsed, time left or percent. Tap the ring to switch
- Change the start or end time whenever you need to
- Milestone notifications and a reminder before your fast ends
- A celebration when you finish, with your mood, a note and a picture of your fast to share

Know what is happening
- 17 fasting stages, from digestion to refeeding, and what each one means
- Tips that make fasting easier
- The scientific sources behind the stages and the calculators

Log what matters
- Weight, body fat, waist, ketones, blood glucose and blood pressure
- Energy, hunger, motivation and anxiety on a scale of 1 to 10
- Calories, water, sodium, potassium and magnesium
- Daily notes, and past fasts you add by hand
- Apple Health - read weight, body fat, steps, heart rate and glucose, and write weight and body fat back

See your patterns
- A fasting calendar, charts of your fasting hours, recent fasts and streaks
- Trends for your measurements and how you feel, and your BMI
- Patterns found in your own data, such as when you feel hungriest

Calculators
- Extended fasting - estimate the weight you lose in a fast of 1 to 40 days, split into fat, protein, water and gut contents, with a refeeding guide
- Intermittent fasting and calorie deficit - set a goal weight or daily calories and see a day-by-day projection

Everywhere you look
- Home screen widgets, a Live Activity on the Lock Screen and in the Dynamic Island, and an Apple Watch app with complications
- Dark mode, accent colors, and pounds, kilograms or stones
- Sixteen languages: English, Spanish, German, French, Portuguese, Italian, Polish, Turkish, Ukrainian, Russian, Japanese, Korean, Arabic, Indonesian, Urdu and Bengali
- Import fasts from Easy Fast or Zero, and export your data to Excel
- Use it without an account, or sign in with email, Google or Apple to sync between your devices

Important
Fasting Center is for general wellness and education. It is not medical advice. Extended fasting is not right for everyone, especially if you are pregnant, breastfeeding, under 18, underweight, or have a medical condition such as diabetes or a history of eating disorders. Talk to your doctor before you start. Weight and body composition projections are estimates, not predictions.