The social Sudoku
SudoKoum: the social, ad-free Sudoku you pay for once, forever.
Challenge your friends and family, climb the leaderboards, unlock 100 achievements and track your stats. Online with the people you love, offline solo. On iOS and Android.
Free to try. A single €3.99 purchase unlocks everything, forever. One email only, on launch day.
Solo too, anywhere
Grids generated on demand, a score that rewards pace and streaks, and five levels that multiply your points. All of it works fully offline, on a plane or at the bottom of the garden.
Progress that keeps you coming back
100 achievements to unlock, from your first flawless grid to feats only the most stubborn will ever see. Experience levels to climb, a daily quest, and statistics that show your real progress over three months, level by level.
Your best time is not a number buried in a menu. It is a curve that keeps dropping, game after game.
Built to last, translated for everyone
13 languages, from English to Japanese. Light, dark or automatic theme. Optional timer, adjustable haptics, same-digit highlighting. SudoKoum adapts to the way you play, not the other way around.
And your progress follows your account: switch phones, everything comes with you.
What no other Sudoku app combines
The big Sudoku apps are 100% solo and live off advertising or subscriptions. SudoKoum combines the three things players actually ask for.
| SudoKoum | Typical free apps | Premium solo apps | |
|---|---|---|---|
| Friend challenges and leaderboards | Yes | No | No |
| No ads at all | Yes | No | Yes |
| No subscription (one purchase, for life) | Yes | Often not | Yes |
| 100 achievements and detailed stats | Yes | Partial | Partial |
Frequently asked questions
Does SudoKoum contain ads?
No. SudoKoum contains no advertising at all, neither in the free version nor in the full version. That is a permanent commitment.
Is SudoKoum free?
Yes. The download is free and lets you play solo and start your first challenges. A one-time €3.99 purchase then unlocks every feature, forever.
Do I need a subscription to play SudoKoum?
No. SudoKoum has no subscription. A single €3.99 purchase gives you everything, forever.
Can you play Sudoku with friends on SudoKoum?
Yes, that is the heart of SudoKoum. You send a challenge to a friend, everyone plays the same grid and the leaderboard compares scores. Duel history and friend leaderboards are built in.
Can you play SudoKoum offline?
Yes. Solo mode works entirely without an internet connection.
Which platforms is SudoKoum available on?
SudoKoum is coming to iPhone and iPad (App Store) and Android (Google Play).
What does the one-time €3.99 purchase unlock?
Unlimited friend challenges, all 100 achievements, detailed statistics and the full level progression. Once, for the lifetime of your account.
Which languages is SudoKoum available in?
SudoKoum is translated into 13 languages, including English and French.
Be there at launch
SudoKoum is coming to the App Store and Google Play. Leave your email and get a single message, the day the app ships.
Sudoku, finally social
Tuesday, 10:40 pm. Your sister sends you an Expert challenge. You play it over breakfast, your best friend plays it on the train, grandma joins in after lunch, and by 4 pm the leaderboard drops. Nobody scheduled anything, yet you all played together.
One link is enough
Send your challenge through any messaging app. Your friend taps, plays, and the duel is on.
The same grid for everyone
Everyone plays exactly the same grid, whenever they want. The leaderboard compares like with like.
Scores are earned
Mistakes and hints count against your score. Winning a SudoKoum challenge actually means winning.