A two-player card duel: build 21 with 4 cards, then check or trade.
Half luck, half mind game. A match takes 1–2 minutes. Practice vs CPU, play friends, or climb the ranked ladder.
Free · no sign-up · no gambling · no pay-to-win
Pick 4 cards from 1–10 totaling 21 or less. Up to two of the same number.
One random card from each hand is shown. The reading begins.
The higher draw chooses to go first or second.
Keep your hand, or force a one-card swap. If either player calls Trade, both must trade.
Closest to 21 wins. 22+ busts. Ties go to the highest card. Exactly 21 earns a bonus.
Decks and traded cards are visible to your opponent. Predictable players get punished.
Easy and Normal. Normal reads your recent tendencies.
Invite by room code, QR or link. Rematch instantly.
Play the world. Rankings by points and rating.
Japanese, English, Chinese, Korean, Spanish, Portuguese, French, German, Indonesian, Thai, Vietnamese.
Play instantly. Link Apple to keep your account across devices.
Against someone who always sits on 21, build 20 and trade into 21. Against a trader, check and hold. Your history is visible too — so every match is a fresh bluff.