Fastly: Intermittent Fasting

Lose weight and take control of your eating with Fastly — the complete intermittent fasting tracker that's actually free. Start a fast in one tap and watch a beautiful timer reveal what your body is doing right now: fat-burning, ketosis, and autophagy. Follow any schedule, track your weight and progress, build streaks, and stay motivated — with no $70/year subscription.

Most fasting apps lock the features that keep you consistent behind an expensive paywall. Fastly gives you everything, free.

🔥 Live fasting stages
See your body move through each stage as your fast progresses — fed, fat-burning, ketosis, autophagy, and growth hormone. Know exactly when you'll reach the next stage and what it does for your body. It's the motivation that gets you through the hard hours.

⏱ A timer you can trust
One-tap start and stop. A glowing ring fills as you fast and shifts color with each stage. Your elapsed time stays exact after backgrounding, a reboot, or a phone restart — because a wrong timer is the fastest way to quit.

📅 Every schedule, all free
16:8, 18:6, 20:4, OMAD (23:1), 14:10, 12:12, 5:2, Warrior, Circadian, and fully custom. Beginner to advanced — switch anytime and set a recurring weekly plan.

📉 See your results
Log your weight and watch the trend move toward your goal. Track BMI, body measurements, fasting hours, average fast length, and completion rate with beautiful charts.

🏆 Stay motivated
Build streaks, take on challenges, earn milestones, and beat your longest fast. Visible progress is what keeps you going.

💧 Water and reminders
Track hydration and get calm, motivating reminders — fast start and end, eating-window open and close, "you'll reach ketosis in 1 hour," and log-your-weight nudges.

📚 Learn as you fast
Built-in guidance on fasting benefits, what breaks a fast, the science of the stages, and beginner tips — no paywall.

✅ Free, no subscription
All fasting protocols, live stages, weight and progress tracking, streaks, challenges, water, reminders, and content are free. No subscription, no "shell" free tier. There's an optional one-time remove-ads upgrade if you'd like a clean screen.

Whether you're starting your first 16:8 or chasing autophagy on OMAD, Fastly gives you the complete toolkit to lose weight, burn fat, and feel great through intermittent fasting.

Download Fastly and start your first fast today — it's free.

Fastly is not a medical device and does not provide medical advice. Talk to your doctor before starting any fasting or weight-loss program.