FastSyncer, explained

Most fasting apps give everyone the same window every day. But female hormones change across the month, and long fasts on the wrong days can raise stress hormones, wreck sleep, and disrupt cycles. FastSyncer moves your fasting hours day by day, so you push when your body can take it and ease off when it needs fuel.

You tell the app where you are in your cycle — or that you're in perimenopause, menopause, or have irregular cycles. Each morning it shows how many hours to fast that day and which foods support the hormones that are active right now. No charts to study. One simple card.

Yes. There are dedicated tracks for perimenopause, menopause, and irregular cycles. Instead of following calendar days, the app uses your daily check-ins and symptoms to guide your fasting hours and food.

Never. Shorter days and rest days are part of the plan, not a failure. The app celebrates showing up, not suffering — and the reminders go quiet overnight in your own timezone.

The core fasting tracker will be free. The full hormone-synced plan, guided challenges, and premium tools are part of a paid membership. Waitlist members get launch offers first.

We're building it now. Join the waitlist and we'll email you the moment it opens — waitlist members get in before the public launch.