Ten players, not seven
Sunday's game has ten places in Booking. Everyone takes theirs, and by Thursday the organiser sees two are left: a nudge in the chat, not a panic on Sunday morning.
Use case
Five-a-side, padel, tennis or basketball: book the slot, see who's playing and split the pitch hire. The game kicks off with ten, not seven.
Picked for what you actually share.
The team chat: Sunday's score, the photos, who forgot their shirt.
Every game in the calendar: everyone says in or out and gets a reminder. You know early if you're short.
The court, the pitch or places in the game: a slot can have several places, everyone books theirs and sees when it's full.
Sunday morning or Tuesday night? Suggest the slots, everyone votes, the most popular wins.
Pitch hire, new balls, drinks afterwards: everyone logs what they pay, YouTim shows who owes whom.
Balls, bibs, the pump, water bottles: everyone signs up for what they'll bring.
YouTim brings all your group's tools together — chat, calendar, budget, photos and more — in one place.

What it looks like day to day.
Sunday's game has ten places in Booking. Everyone takes theirs, and by Thursday the organiser sees two are left: a nudge in the chat, not a panic on Sunday morning.
Four friends share a court membership: everyone books their hour, and the schedule shows the slots that are still free.
The pitch costs £70 an hour. The organiser logs it, YouTim splits it between the players and shows who owes what.