Versus
Both of you online, racing the same board. First to crack it wins.
6 games
⚡ free on iPhone and Android1v1 or co-op
1v1 or co-op
with your mate.
Thirteen games, one rival. Live when you are both there, a move at a time when you are not. The score never resets.
1Pick a game.Thirteen of them, one grid. Word games, puzzles, board games. Tap one.
2Get them in.Send a code, or tap a friend who is online. They are in the lobby in seconds. Or send a turn and let them answer tonight.
3Settle it. Then again.Every result goes on a permanent record against that one person. The score never resets. That is the whole point.
13
games, from cryptics to four in a row
4
ways to duel — live, turns, co-op, anytime
0
subscriptions. Pro is a tip jar.
0
pay-to-win. It buys cosmetics, not wins.
🎮 seven of the thirteen
What they feel like.
One rule each. That is all it takes to know whether you will lose an evening to it.
🔎 Word Chaser
Same words. One winner.
One themed grid, both of you on it at once. Drag to claim a word before your rival does. The count decides it.
The one ruleEvery word you claim is one they cannot.
⚡ Versus🌙 Anytime
How to play Word Chaser →
🟩 Cipher Storm
Five words. Six guesses each.
Head-to-head five-letter cracking. Same five words for both of you, a clock on the wall, and the colours telling you how close you are.
The one ruleCrack more of the five than they do.
⚡ Versus🌙 Anytime
How to play Cipher Storm →
🔢 Sudoku
One board. Two brains.
Co-op on a single grid, live. You take the top, they take the bottom, and nobody guesses. Easy, medium or hard.
The one ruleThe board only finishes when you both do.
🤝 Co-op🌙 Anytime
How to play Sudoku →
🗺️ Path Pursuit
Trace words. Claim the grid.
Every word you trace paints its letters your colour. Longer words, more ground. The grid ends when it is full.
The one ruleLength beats volume. A seven-letter word is a landslide.
⚡ Versus🌙 Anytime
How to play Path Pursuit →
🚢 Fleet Hunt
Call a square. Sink the fleet.
Four hidden ships each on an 8×8 sea. Call a square on theirs. A miss passes the turn. A hit does not.
The one ruleA hit keeps your turn. Follow it.
🎲 Turns
How to play Fleet Hunt →Fleet HuntFind and sink the hidden ships
🥊 Word Brawl✨ New
Spell it. Swing it.
Same letter grid, both of you at once. Every word you trace is a punch on their fighter. Longer words hit harder; SLAP, ZAP and BURP do exactly what they say.
The one ruleThree words in five seconds is a combo. Typos trip you.
⚡ Versus
How to play Word Brawl →
🔳 Dots & Boxes
Draw a line. Close the box.
The pencil game, against one person, live or a line a day. Draw the fourth side of a box and it is yours.
The one ruleClose a box, draw again. Never give the third side.
🎲 Turns
How to play Dots & Boxes →Dots & BoxesDraw a line, close the box
⚔️ how you play
“They're never online” is not a problem here.
Four ways to reach the same person. Race them live, take turns, team up on one board — or leave a challenge on their doormat.
Turns
One shared board, alternating moves, settled by the server.
5 games
Co-op
Same board, same side. Solve it together in real time.
2 games
Anytime
Fire off a challenge. They play when they want. Scores compared.
7 games
Anytimeis the one that actually matters. Live games need two people free at the same moment, which is why most games-with-friends die in week two. A challenge that waits doesn't care about your calendar.
🔥 the grudge
A scoreline you can't stop thinking about.
Every duel goes on the record. Head-to-head against each friend, a rating that moves, and a rematch button that is genuinely hard to ignore at 11pm.
01
Head-to-head, forever
Your record against each friend, per game. It never resets. That's the point.
02
A rating that means something
Glicko-2 — the system chess uses. It tracks how certain it is about you, not just how good.
03
Nobody to play right now?
Leave the challenge anyway. They answer when they open the app, and it counts exactly the same.
Your players⚡ 3 live
P
Priya
won by 4.2s
7–5
D
Dad
lost — again
2–9
S
Sam
dead even
12–12
your rating
1,482
last duel
+18 ▲
🕹 try one here
A duel, right now, in your browser.
No signup, no download. One round against the house, then go find someone who will actually care that you won.
YOU 0—0 RIVAL
SAME LETTERS · ROUND 1The whole point of this app
You
Rival
Same letters. Two screens. Go faster.
No signup. No download. Just beat them.
❓ the questions
Things people ask before downloading.
What is Duelo?+
Duelo is a head-to-head brain-games app. It bundles thirteen games — word games, board games and puzzles — and lets you play any of them against one specific friend. All thirteen work live; seven of them — the five word games, Sudoku and Queens — also work asynchronously, so neither of you has to be online at the same time. Every result feeds a permanent record against that person.
Can I play games with a friend who's never online at the same time as me?+
Yes. Anytime mode lets you send a challenge your opponent plays whenever they like; the app compares your results and updates your head-to-head record. This is the mode most people end up living in, because live play needs two people free at the same moment.
Is Duelo free?+
Yes, free to play, and there is no subscription. A one-off Pro purchase removes ads and unlocks cosmetics. It grants no competitive advantage of any kind — it cannot buy you a win.
Who can I play against?+
A person you chose, every time. You invite a friend, or send a challenge link to anyone. There is no matchmaking, no queue and no stranger pool. There are no bots either — nothing on a leaderboard that isn't someone. If they're not online, you leave a challenge instead of playing a machine.
What games are in Duelo?+
Crossword Chaos (Real-time clue duels), Word Chaser (Hidden-word hunt), Cluster Clash (Group the words), Cipher Storm (Five-letter word race), Path Pursuit (Trace-and-claim word grid), Word Brawl (Words are punches), Four in a Row (Drop & line up four), Fleet Hunt (Find and sink the hidden ships), Dots & Boxes (Draw a line, close the box), Sudoku (Solve it together), Bomb Pass (Hot potato, but explosive), Trapdoor Panic (Cross the hidden minefield), Queens (One per row, column & color).
What's the difference between live and async multiplayer?+
Live means both players are online at once — either racing the same board simultaneously, or alternating turns on a shared one. Async means one player sends a challenge and the other answers it later. Async is what keeps a rivalry alive across time zones and busy weeks.
Can you play Sudoku with a friend?+
Yes — Duelo has co-op Sudoku, where two players fill in the same board live rather than racing separate copies of it. There are no turns; either player can fill any empty cell at any time.
How does the rating work?+
Competitive duels are rated with Glicko-2, the system used in competitive chess. Unlike plain Elo it also tracks how confident it is in your rating, so a new player's number settles quickly. Co-op games are unrated, because a shared solve has no losing side.
Do I need an account to play?+
You need one to keep a head-to-head record against a specific friend, since the record has to belong to someone. Joining a live room a friend has shared works from a link.
Go ruin someone's evening.
Free to start. No signup to play. Pick a game, pick a person, and let the scoreline do the rest.
(psst — hit the belt)
Duelo is made by one person in London. Be nice to the servers.