Inspired by Marshall & Lily

Make legendary
long-term bets

Create private predictions about your friends' futures. We'll keep the secret and remind you when it's time to pay up."Not yet." — Marshall Eriksen

Official Bet Slip

Recorded for posterity. No take-backs.

Your long-term bet *

What's at stake?

Your email *

Friend's email

Add more friends with commas: friend1@example.com, friend2@example.com

When should we check back?

Start checking

When should we start sending reminders? Suit up—yearly by default.

How long?

times

Preview: We'll check yearly starting Dec 22, 2026 for 10 times (ending around Dec 20, 2035) at 09:00 (UTC)

Built on Google Calendar's reliable infrastructure.
Bets that last decades need a platform that will still be there.

1
Make a Prediction
"Ted will go bald by 40." Set the terms, the stakes, and the participants.
2
Calendar Invite
We create a recurring event on Google Calendar. Everyone gets an invite.
3
Settle the Bet
Years later, the calendar reminder pops up. Time to pay up (or double down).