Fasting made simple. No account. No subscription.
FastSloth is the simple intermittent fasting tracker for iPhone. Start tracking right away with no account or login, and if you want an ad-free experience, unlock it with a one-time App Store purchase instead of a recurring monthly fee.
Start instantly
No signup, email, or password required.
One-time upgrade
Remove ads once through the App Store. No recurring charges.
Private by default
Your app preferences stay on your device.
Everything You Need, Nothing You Don't
Build a sustainable fasting routine without handing over your email address or signing up for a recurring subscription.
No account required
Download the app and start fasting immediately without creating an account or sharing personal details.
One-time upgrade
If you want to remove ads, it is a simple one-time App Store purchase instead of a monthly commitment.
Private by default
Your app preferences stay on your device, keeping the experience lightweight and privacy-friendly.
Fasting Timer
Track your fasts with an intuitive circular progress ring. See elapsed time, fasting state, and ketosis markers at a glance.
Multiple Fasting Plans
Choose from popular plans like 14:10, 16:8, 18:6, 20:4, OMAD, or create your own custom fasting schedule.
Hydration Tracking
Stay hydrated during your fasts with built-in water tracking. Log glasses of water and monitor your daily intake in millilitres.
Insights Dashboard
View your fasting trends with detailed statistics including hours fasted, streaks, average duration, and weekly progress charts.
Wellness Tracking
Log how you feel during fasts. Track your energy levels, mood, and hunger to understand your body's response over time.
Smart Reminders
Never miss a meal window. Get notifications for eating windows, milestones, morning reminders, hydration, and fast endings.
How It Works
Get started with intermittent fasting in three simple steps, with no signup wall in the way.
Choose Your Plan
Select from popular fasting schedules like 14:10, 16:8, 18:6, 20:4, OMAD, or set a custom fasting window that fits your lifestyle. No account required.
Start Fasting
Tap start and let FastSloth track your progress with real-time updates, stage markers, and hydration reminders throughout your fast.
Review Your Progress
Check your insights, streaks, and weekly trends to stay motivated. If you want an ad-free experience later, unlock it once instead of subscribing.
See FastSloth in Action
Browse the latest App Store previews for FastSloth on iPhone.
Frequently Asked Questions
Everything you need to know about FastSloth, from fasting plans to pricing and privacy.
Start fasting without another login or monthly fee
Download FastSloth for free, start without creating an account, and upgrade once if you want an ad-free experience. No subscription required.
FastSloth is built for both iPhone and iPad.
