SixteenEight is a clean, beautifully designed intermittent fasting app that helps you build healthy fasting habits and track your progress over time.

FASTING MADE SIMPLE
Start a fast with one tap and watch your progress in real-time. The app tracks your fasting duration, shows which metabolic phase you're in, and notifies you when you've reached your goal. No complicated setup required.

POPULAR FASTING SCHEDULES
Choose from proven intermittent fasting methods:
- 16:8 (16 hours fasting, 8 hours eating)
- 18:6 (18 hours fasting, 6 hours eating)
- 20:4 (20 hours fasting, 4 hours eating)
- 23:1 / OMAD (One Meal A Day)
- Custom weekly schedules to fit your lifestyle
- Vacation mode for breaks

TRACK YOUR JOURNEY
Comprehensive statistics help you see your progress:
- Beautiful year-at-a-glance calendar heatmaps
- Current and longest streaks
- Weekly and monthly trends
- Weight tracking with smart predictions
- Trend analysis with confidence indicators

WEIGHT PREDICTIONS
Log your weight and see where you're headed. The app calculates your trend and predicts future progress with confidence ratings, helping you stay motivated toward your goals.

DIFFICULTY TRACKING
Rate how each fast feels and discover patterns in your fasting experience. View your ratings as a color-coded calendar heatmap to identify which days or times of month are easier or harder for you.

STAY MOTIVATED
Optional features to keep you on track:
- Motivational messages during your fasts
- Fasting start and completion reminders
- Mid-fast check-in prompts
- Water intake reminders
- Shareable achievement cards

FEATURES
- One-tap fast start and stop
- Real-time countdown or count-up timer
- Fasting phase education with science
- Multiple schedule presets and custom plans
- Year calendar with GitHub-style heatmap
- Weight tracking with trend predictions
- Difficulty ratings with visual insights
- Complete fasting history
- Edit or delete past fasts
- Streak tracking with bonus fast support
- Share your achievements
- Export and import your data
- Works completely offline
- No account required
- No ads, ever

PRIVACY FIRST
All your data stays on your device. No account creation, no cloud sync, no tracking. Your fasting journey is yours alone. Export your data anytime for backup or transfer.

PERFECT FOR EVERYONE
Whether you're new to intermittent fasting or a seasoned pro, SixteenEight provides powerful tools wrapped in a simple, intuitive interface. No clutter, no subscriptions, just the features you need.

Start your fasting journey today with SixteenEight.