Swipe to punch and kick the flashes.

A lightning-fast one-thumb karate arcade game. Read the flash, strike the right way, and keep the combo alive as the dojo speeds up.

Download on theApp Store Out now on iPhone
Free to play No tracking · kid-friendly One-handed play
🏆Best 760Global rank
🔥x12 comboKeep it alive
Fun Ku gameplay: a karate fighter in a dojo with the score and Tap to Start
One thumb, four strikes

Easy to learn. Brutal to master.

A flash lights up. Swipe the matching way before it fades. Miss one and it’s over — so read fast and trust your reflexes.

Left punch

Swipe left to snap a jab at a flash on your left.

Right punch

Swipe right to fire back the other way.

Left kick

Swipe down-left to drop a low roundhouse.

Right kick

Swipe down-right and keep the combo climbing.

Unlock the dojo

A whole roster of fighters

Earn tokens as you play and unlock a cast of characters — each with its own set of outfit colors to mix and match.

Master Mei fighterMaster MeiRed · 5 colors
Ninja fighterThe NinjaRed · 5 colors
Panda fighterThe PandaRed · 5 colors
Robot fighterThe RobotGold · 5 colors
Fox fighterThe FoxRed · 5 colors
Disco fighterDisco KingGold · 5 colors
Alien fighterThe AlienBlue · 5 colors
Monkey fighterThe MonkeyRed · 5 colors
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More fighters to unlockKeep playing to earn them

Every fighter comes in five outfit colors. Hover one to see them warm up.

Change the scenery

A whole world of arenas

Swap the backdrop behind your fighter — from a lantern-lit dojo to lava, candy land, or the deep sea, with more on the way.

🏮DojoStarter
🌋VolcanoLava
🍭Candy LandSweet
🌊Deep SeaCoral
🏙️City StreetUrban
🏜️CanyonDesert
👻GraveyardSpooky
🚀Sci-FiNeon
🏔️Snow PeakWinter
🌲Dark ForestHaunted
Built to be fair

Made for quick rounds and long streaks

Global leaderboard

Post your best run to the Game Center leaderboard and chase the top spot.

iCloud save

Scores, tokens and unlocks follow you to every iPhone signed in to your Apple ID.

Kid-friendly & private

No tracking, no personalized ads, and a G-rated experience by design.

One-time ad-free

Prefer a clean run? A single purchase removes all ads for good.

Tokens & unlocks

Every round earns tokens toward new fighters, outfit colors and arenas.

Instant restarts

Game over in a flash — and one tap drops you straight back into the fight.

Fun Ku app icon

Think your reflexes are fast enough?

Grab Fun Ku, warm up your thumb, and go for the leaderboard.