Now on the App Store
Download FastSyncer — Fasting That Follows Your Cycle
Our intermittent fasting app for women is live. Every morning it sets your best fasting hours and the best foods for the day — matched to your hormone cycle. Free on iPhone.
One card a day. Everything decided for you.
Most fasting apps give every woman the same timer, every day of the month. FastSyncer doesn't. It knows where you are in your cycle and adjusts your fasting hours and food guidance daily — longer fasts when your body handles them well, gentler days when it needs fuel.
Learn more on the app's own site at fastsyncer.com.
What's in the App
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Cycle-Synced Fasting Hours
Every morning the app sets your best fasting window for today, matched to where you are in your cycle.
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What to Eat Today
A daily card tells you exactly which foods help you today — and which to avoid — based on your cycle phase.
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Auto-Start Tracking
The tracker starts itself at your usual time. Open the app and your fast is already running.
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Progress You Can See
Fasts, streaks, and how your body responds across the month — all in one view.
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Built on Real Protocols
The same hormone-aware fasting approach taught across this site, turned into a daily companion.
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3 Months Free With the Book
Bought Intermittent Fasting in Practice? Claim 3 months of the app free.
Book buyers get 3 months free
Bought Intermittent Fasting in Practice on Amazon? Download the app, then claim your 3 free months below.
Android is coming to Google Play soon — the iPhone app is available worldwide today.