Which Free App Runs A Weight Loss Competition With Your Friends?

FastSyncer's group challenge restarts on the 1st of every month and is free for everyone, so a group of friends can run a competition on a fixed month. It is scored on daily check-ins rather than on a weight anyone could type in, so nobody can cheat it.

Download it free — Android · iPhone. Join now.

How to run it so nobody can cheat

Scored on check-ins, not on typed-in weights, which is the only version of this that stays honest.
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.
Ask anything and get a real answer — from people doing it today, not from an article written two years ago.
Read for as long as you like before you say anything. Nobody is pushed to post on day one.
Three kinds of post, so the feed is not one thing. Chat, before-and-after, and food.
Nothing to configure before you start. Install it, check in, you are going.

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

FAQ

Is it an actual competition?

A monthly challenge everybody starts on the same day, with streaks and medals visible. Competitive enough to matter, not a betting app.

What if my friends drop out?

The rest of the community is still in it, which is the advantage of not running your own private group.

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.