Simple fasting timer
Start a 12-hour overnight fast in seconds and follow your progress with a clear, calming timer.
Beginner-friendly overnight fasting
Build a healthier routine. One fast at a time.
Start with a simple overnight fast, track your progress, and wake up feeling more in control — without extreme diets or complicated routines.
12:12 beginner-friendly fasting
Sleep, hydration & energy insights
Apple Watch, widgets & Live Activities
Privacy-first: no account required
Everything you need to stay consistent
More than a timer. A smarter routine.
Fast12 connects fasting, hydration, sleep, energy and progress into one calm daily system.
Personalised guidance
Get practical insights based on your fasting routine, sleep, hydration, energy and consistency.
Hydration tracking
Log water quickly and spot patterns that may affect hunger, cravings and fasting consistency.
Sleep insights
Understand how rest connects with energy, cravings and your ability to stick with a routine.
Meal guidance
Break your fast with confidence using simple meal ideas built around your fasting window.
Apple Watch ready
Track from your wrist, widgets, Lock Screen and Dynamic Island so your fast stays visible.
Built for real life
Start tonight. Wake up with one healthy win.
Fast12 is designed for people who want a simpler first step into intermittent fasting — not an intimidating challenge.
01
Close the kitchen
Choose your fasting window and start a simple overnight reset after your evening meal.
02
Follow your timer
Stay on track with a clear progress ring, fasting phases and gentle reminders.
03
Wake up in control
Build momentum with streaks, insights and small wins that feel realistic.
No account required
Start tracking your fasting routine without creating a profile first.
Privacy-first design
Built for health-conscious users who want control over their data.
Weekly progress reports
Review fasting, hydration, sleep and energy trends in one clear summary.
Try it yourself
Experience Fast12 in real-time.
Interact with our live app simulator. Log your hydration, start or end a fasting session, and explore tabs like Coach, Log, Nutrition and Settings to see how Fast12 guides your day.
Live Fasting Timer: Start and end fasts with real-time countdowns.
Water Logger: Log water intake and watch the hydration target progress.
Coaching & Recipes: Toggle tabs to see stats and break-fast guidelines.
Your Plan
🔥 4
💧 500ml
12:12
Intermittent Fasting
Most popular for beginners
Start
Today, 20:00
Fasting Window
12
hours
hours
Eating Window
12 hours
Daily Tip
Drink water when you feel hungry. Often, thirst is mistaken for mild hunger cues, and water supports early glycogen depletion.
Weekly Progress
12h 15m
Average Fast
96%
Consistency
Fasting Duration
Coach Tip: Fasting consistency is key for steady fat burning. Stick to your window tonight!
Daily Hydration
Streak
7 Days Consistent
Meal Guidance
How to break your fast correctly for maximum metabolic benefit:
Protein & Fats First
Avoid insulin spikes by eating eggs, avocado or nuts.
Complex Carbs
Follow up with high-fibre vegetables and grains.
App Settings
Fasting Goal (12h)
Sleep Correlation Sync
Fasting Reminders
Start your first fast tonight.
Download Fast12 today. The privacy-first, beginner-friendly overnight fasting tracker that helps you build a healthier routine one step at a time.