Frequently asked questions

How do two devices connect without a server?

It uses a direct browser-to-browser (WebRTC) connection with a manual handshake. The host taps “Host a game” and gets a link; the other player opens that link and their device produces a short answer code; the host pastes that code in and the two browsers connect directly. There's no game server in the middle — after the handshake, every move travels straight between the two devices.

Do both players have to be on the same Wi-Fi?

Not necessarily. On the same network it always works. Across different networks (say home Wi-Fi and mobile data) it works in most cases too, using free public STUN servers purely to help the two browsers find each other — they never see your moves. The only setups that can't connect directly are strict “symmetric NAT” networks, which need a relay server this tool deliberately doesn't run.

Is anything uploaded or tracked?

No. There's no account, no server storing your game, and nothing uploaded. Your ship positions and shots are exchanged directly between the two browsers over the peer connection. It's free, with no sign-up.

How do you play?

Each player secretly places a fleet of five ships on a 10×10 grid (place them by tapping, or hit Randomize). Then you take turns firing at coordinates on your opponent's grid. You're told hit or miss, and when a ship is fully hit it's sunk. The first player to sink the opponent's entire fleet wins.

Can I play on my phone?

Yes. The board is fully responsive and touch-friendly, and the host screen shows a QR code so your opponent can scan the link straight into their phone. One of you can be on a laptop and the other on a phone.

The connection didn't work — what can I do?

Make sure the second player opened the full link (or pasted the whole code), and that the host pasted the answer code back in and pressed Connect. If you're on networks that block peer connections, try putting both devices on the same Wi-Fi. You can always start over from the host screen.