FastlySimple fasting timer, no account.
Fastly is an intermittent fasting tracker: tap once to start a fast, pick 16:8, 18:6, 20:4, OMAD or your own hours, and see your streak, weight and water in one place.
Sound familiar?
I never know if I really fasted 16 hours or just skipped breakfast.
Every fasting app wants an account and a subscription before I can even start.
I forget when my eating window opens and when it closes.
I'd like to see if I'm actually staying consistent, not just guess.
What Fastly gives you
One-tap fasting timer
Tap Start Fast and a progress ring counts your time. Change the start time if you began earlier than you tapped.
Popular plans or your own
Presets for 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD (23:1), or set a custom fasting goal that fits your day.
Fasting stages
A card shows the stage people commonly describe for each hour of a fast. It is educational and not a measurement of your body.
Streak and weekly activity
A streak card, a weekly activity chart and fasting stats show how consistent you have been.
Weight and water logs
Log your weight against a goal and track a daily water target, with charts of your progress.
Notifications and a home screen widget
Get a notification when your fast is complete, plus milestone alerts along the way, and see your fast on a home screen widget. Available in 32 languages.
Straight from the App Store
How it works
Pick a plan
Choose 16:8, 18:6, 20:4, OMAD or a custom number of hours.
Tap Start Fast
The ring fills as the hours pass. Edit the start time if you need to, then tap End Fast when you eat.
Watch your streak
Log your weight and water if you like, and see your streak and weekly activity build up.
Start without an account
There is no sign-up and no email. Your fasts, weight and water are stored on your phone and the app works offline. The app sends crash reports to Firebase Crashlytics, and purchases go through RevenueCat. You can export your fasting history as a CSV file with Fastly Pro.
Free guides
Free tools
- Fasting schedule calculatorPick 16:8, 18:6, 20:4, OMAD or your own hours, add your wake-up and sleep times, and see your eating and fasting windows on a 24-hour ring. Print it if you like.
- When can I eat? Fasting timerEnter when your last meal ended and your plan to see how long until your eating window opens, your progress, and the general stages people talk about.
Questions
Is Fastly free?
Fastly is free to download. Some features, such as your full fasting history and CSV export, need Fastly Pro.
Do I need an account?
No. You can start tracking right away without an email or password.
Which fasting plans does it have?
12:12, 14:10, 16:8, 18:6, 20:4 and OMAD (23:1), plus a custom fasting goal.
Does it work offline?
Yes. Your data lives on your phone, so the timer works without a connection.
Is Fastly medical advice?
No. The fasting stages are general and educational, and people differ. Talk to a doctor before fasting if you have a medical condition, take medication, are pregnant or breastfeeding, or have ever had an eating disorder.
Does it work on Android and iPhone?
Yes, both, with a home screen widget and notifications.
Start your first fast tonight.
Download Fastly free on Android and iPhone.