Swell

You saw that coming.The probability didn’t.

Know what happens in the next five minutes of a live event. The probability follows — the right side takes the pool.

1. Pick a live event

Football, tennis, esports — anything running right now. Each one carries a probability from Polymarket, and it moves while the match does.

Probabilities from

NOW AVAILABLE ON WEB

Pick fast.Then you can’t.

Five-minute windows: five minutes to pick a side, then the five minutes you called. Live sport, politics and weather.

Baseball26 windows resolved in this event

Minnesota Twins vs. San Francisco Giants

Minnesota Twins4%
San Francisco Giants96%

last 22 windows

Basketball23 windows resolved in this event

Dallas Wings vs. Phoenix Mercury

Dallas Wings94%
Crypto156 windows resolved in this event

Bitcoin above 86,000 on September 22?

33%chance of yes

Crypto156 windows resolved in this event

Bitcoin above 84,000 on September 22?

89%chance of yes

Tennis11 windows resolved in this event

Korea Open

Himeno Sakatsume24%
Live now10Politics · Tennis · CryptoAll markets

You already know what's next.

Now there's five minutes to say it.

Sinner — AlcarazBetting open · 1:47

0.62+0.04

UPDOWN

THE CALL

Call the next five minutes.

LockedResolves in 92s

Reference line 0.58

LOCKED IN

Watch it land, second by second.

Pool$2,940
14%86%
UPDOWN
$25 · Payout$169.64

YOUR SHARE

Fewer winners, bigger share.

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$25$50$100

•••• 4242USDC · Base

FUNDING

Top up with a card.

Your sideUP

gas$0.14 $0

$25.00USDC

Pick a side

NO GAS

Gasless picks and payouts.

Five minutes to be right.

10 events running right now.

1. Pick a live event

Football, tennis, esports — anything running right now. Each one carries a probability from Polymarket, and it moves while the match does.

Questions worth asking.

What am I actually picking?

Up or down on the probability over the next five minutes — not who wins the match. The match is what moves the number; the number is what you call.

Where does the number come from?

From Polymarket. The live price of a market is its probability, and we read it — we don't set it. Open the same market and check.

How is a window decided?

Five minutes to pick, then five with the pool locked. The base is the average price over the last 30 seconds before the cutoff; the final is the average over the last 30 seconds before resolution. Higher means up. Both are averages over per-second samples, not single ticks — one print can't decide a window.

How much do I get if I'm right?

Your share of the pool, not a fixed price. The fewer people on your side, the bigger the slice.

What if the line doesn't move?

Nobody was right, so nobody takes anything: the whole pool goes back and we take no cut. It's a decision, not a failure — same for windows where the price data wasn't trustworthy.

Are you on the other side of my pick?

No. The pool is made of other people's money, the odds are made by how they split, and we hold no position. We can't win, because we're not playing.

Can you take my money?

The contract has no operator withdrawal. Withdrawals are separated from picks and payouts at the function level, so our server signs the first two and physically cannot sign the third. That's checkable on-chain, not a promise.

What do I need to start?

An email or a Google account. A wallet is created for you — no seed phrase. You hold USDC on Base; picking and getting paid cost no gas.