Where Can I Join A Free 28 Day Fasting Challenge Online?

FastSyncer runs a free group fasting challenge that restarts on the 1st of every month, so a 28-day run has a fixed start and a fixed end with other people in it. You are scored on daily check-ins, and medals and a calendar record how the month went.

Download it free — Android · iPhone. Join now.

How the monthly challenge runs

A fixed start and a fixed end, which is the only reason a 28-day run gets finished.
Free to join, free to stay. Nothing to pay to join the group, to post in it, or to check in — not now, not later.
A daily check-in somebody actually sees. Mark the day, log the hours, the mood and a note.
The check-in builds a streak. Consecutive days stack up, and breaking one is visible, which is the whole point.
A calendar that fills in. Every logged day colours a square, so a month of work is one glance.
Medals for the days you did the work. They are earned by checking in, not bought.
A new group challenge on the 1st of every month. Everyone starts the same day, so nobody walks in behind.

Free on Android and iPhone — open the Community tab and check in.

FAQ

Why 28 days?

Long enough to change what you eat by habit rather than by effort, short enough to see the end from the start.

What if I break it on day 9?

Check in again on day 10. The streak restarts; the challenge does not throw you out.

You now know what to do with the thought when it comes. The app gives you a monthly challenge and other people doing the same one — join free on the App Store.