The classic naval grid duel, rebuilt
Both fleets fire at once.
Nauvo is a 90-second naval duel. Place three ships, fire three shots every twelve seconds, and find out together who hit first. No turns, no waiting.
What it is
You know the classic naval grid duel: hidden ships, called shots, the slow back-and-forth of taking turns. Nauvo keeps the game and removes the waiting.
Both fleets fire at once. Nobody waits their turn. A match runs about ninety seconds start to finish, which is short enough to fit in a queue, a lift ride, or the two minutes before a meeting.
Play a stranger, a friend, or a training fleet. Place your ships, fire your volleys, and watch the outcome resolve together in one reveal, win or lose.
How it works
01
Secret placement
Place three ships on your own 8x8 grid: a two-cell Destroyer, a three-cell Cruiser, a four-cell Carrier. You get 25 seconds; a shuffle button places the whole fleet instantly if you're in a hurry.
02
Simultaneous volleys
Every twelve seconds, you and your opponent each secretly pick three target cells. Neither of you can see the other's picks while the clock is running.
03
The reveal
Both salvos land at the same moment. You find out what you hit and what they hit you, together, in one choreographed reveal, not a turn-by-turn drip.
04
The rematch
Every duel ends the same way: one tap to go again. Sink fast, get hit hard, and fire another round.
Modes
Vs Bot
A training fleet at three difficulty tiers. No connection or account needed.
Quick Match
A live duel against another player, matched instantly.
Ranked
Climb a league ladder from Deckhand to Fleet Admiral. The one mode that needs a free account, because it tracks a persistent rating.
Play a Friend
Send a link. Neither side needs an account to accept it.
Daily Sonar
One deduction puzzle, identical worldwide, resetting every day. Solve it in the fewest shots to keep your streak alive. The Archive lets you replay any past day's puzzle, and Practice gives you a fresh random one any time; neither counts toward your streak.
Why it's different
Ninety-second matches
A full duel, start to finish, in about ninety seconds.
Simultaneous fire, no turn-taking
Both fleets fire together, every twelve seconds. Nobody waits for anybody.
One-tap rematch
Win or lose, the next duel is one tap away.
Ranked leagues
Climb from Deckhand to Fleet Admiral on a persistent rating.
A daily puzzle
One deduction puzzle, identical worldwide, resetting every day.
Play without an account
Vs Bot, Quick Match, Play a Friend and Daily Sonar all work with no sign-in.
Frequently asked
Is Nauvo free?
Yes. Nauvo is free to play. There is no in-app purchase and no subscription.
Do I need an account?
No, except for Ranked. Vs Bot, Quick Match, Play a Friend, and Daily Sonar (including its Archive and Practice) all work without signing in. Ranked needs a free account because it tracks a persistent rating.
What platforms is Nauvo on?
The web app runs today, in any modern mobile or desktop browser, at nauvo.karpinity.com. An iOS app is on its way to the App Store.
How long does a match take?
About ninety seconds.
Can I play with a friend directly?
Yes. Play a Friend sends a link; neither side needs an account to accept it.
Is my data safe?
See our Privacy Policy for exactly what we collect and why.
How do I get support or report a problem?
Visit nauvo.karpinity.com/support or email innovation@karpinity.com.