Eight weeks · fifty-six squares
Nobody trains alone.
A whole group starts on the same Monday. You choose how many days a week you will train, and every committed day you post your evidence to the group. The day you miss, your fine is donated to the cause they voted for.
The rules
Four rules. That is it.
Everyone starts the same Monday
Eight weeks. One group. Nobody joins an edition late.
You pick your days and they do not change
You decide how many days a week. That number stays with you to the end.
Any sport, anywhere
Running, lifting, swimming, dancing, climbing. Forty-five minutes minimum.
Miss a day and it gets donated
100% of the fines goes to the cause the group voted for.
It is already people in several countries moving at the same time.
The decision
How many days a week?
The number you pick on day one is the one that stays with you for eight weeks. It cannot be changed mid-edition, and that is exactly why keeping it is worth something.
A new group every month. There is always one about to start.
Open editions run in Mexico today. Outside Mexico we set up private groups and pilots with gyms and companies. Write to us and we will work out which one fits.
Get in touch →Private challenges
You do not have to wait for anyone.
We set up a challenge just for your group. You invite whoever you want, everyone picks their days and together you vote the cause. The same mechanism, in a closed group, starting whichever Monday you decide.
Start whenever you want
No waiting for the public edition. The Monday you pick is day one.
You already know each other
Walking into a group of strangers is the hard part. Among friends, the evidence turns into conversation from day one.
You choose the cause
The group votes on it the same way the open editions do. 100% of the fines goes to it.
Write to us and we will set it up with you.
Tell us who you are and which Monday you want to start, and we will have the group ready.
More than twenty of you? That is a different thing: see MellowFit Business →
Inside the app
Three things, and all three are the group.
Every piece of evidence shows up there and people react. That is the whole mechanism.
Your days marked from the first Monday, and how far you are into the edition, on one screen.
A photo, a check-in, the mirror, or the minutes on your watch. Garmin, Apple Health, Google Health Connect, Whoop.
What we have done
We started with a WhatsApp group.
It grew the way it works: one person told another. All of that ran by hand, over WhatsApp, with room for 200 people.
The first edition in the app is coming.
What everyone asks
The awkward questions.
What if I get sick or injured?
You tell the group. The community decides, not an algorithm. Nobody is charging you for being ill.
What if I travel?
The commitment is days, not places. A hotel, a park or a pool all count.
Can I change my days mid-edition?
No. That is the point. The number you pick on day one is the one you keep, which is why keeping it means something.
Do I have to be good at a sport?
No. The median in the community is four days a week of anything that lasts forty-five minutes.
What if I do not know anyone in the group?
Almost nobody knows anyone on day one. And if you would rather start with people you already know, that is what private challenges are for.
MellowFit Business
The community is already in your building.
White label challenges for gyms and companies that want to get their members, clients or employees moving. With your brand, without integrating anything into your systems, and the pilot is four weeks free.
Join the next edition
Leave us your email and we will tell you which Monday it starts.
Every edition opens with limited spots. We write once, with the date and the group you are in.