No ads, no account, no connection
A sudoku app with no ads in the way.
Sudoku Mori has no ads in any version, and doesn't need the internet to play. One optional purchase unlocks the rest of the game. No account, no sign-up, no server holding your progress. You open it, play, and close it.
Sudoku Mori comes out on the App Store for iOS and iPadOS on 1 December 2026.
Today's three 
Classic · Medium
Why it matters
What advertising costs a puzzle.
Every sudoku app gets paid for somehow: by the players, or by advertisers. Both can make a good game, but only one has a reason to interrupt you, and it usually happens right when you're deep in a puzzle.
Ads break your focus
Sudoku is one long train of thought. A banner covers the grid, a video plays over the board, and by the time the ad is gone, so is your chain of logic.
Hints behind a video
In an ad-funded game, the moment you need a hint is the moment your attention is worth the most, so that's where the ad goes. Make a hint cost thirty seconds of video and people stop asking for one.
Timers built to pull you back
Countdowns and energy meters are there to get you back tomorrow. They do nothing for the puzzle, and they turn a relaxing ten minutes into a chore.
Paywalls you find later
Ad-funded games often sell a way out of the ads, and it's rarely clear what you're missing until you hit it. Here the free version has no ads to escape, and whatever needs Full says so up front, with a badge.
Free and Full
Play as long as you like. Full adds the rest.
The free download has today's three daily puzzles, Classic Easy and Medium, hints that explain, the first two lessons and your forest. Sudoku Mori Full, bought once and shared with your family, adds past daily puzzles, Classic Hard, Expert and Master, Challenge mode, the other six lessons and practice puzzles. There's no subscription and nothing else to buy.
Every technique, in a lesson
Eight lessons from single candidates to X-Wing, each with a worked example and three exercises; the first two are free. Hints tell you which technique to use, not just which number goes where.
Three dailies and a forest
Three puzzles a day, Valley, Ridge and Summit. Each day you solve grows a tree, with a monthly goal and a streak if you want them. Your progress is tracked, never nagged about.
Relaxed and Challenge
Play with unlimited mistakes and hints, or, with Full, switch to Challenge: hints off and three mistakes.
A full tree 
Your forest
Offline
What offline actually means here.
- Nothing loads from the internet. Puzzles are generated on your device, so starting a game never waits on the network and can't fail on bad signal.
- No downloads mid-game. No puzzle packs, no daily download, no ad SDK waiting to load.
- The network features never block play. iCloud syncs your progress through your own private iCloud when you're signed in, and Game Center leaderboards are there only if you sign in to Game Center. Without either, you lose nothing.
- No account, ever. There's no login, so a server outage can't lock you out.
So there are no loading screens, no "connect to continue", and no subscription. Nothing about you is collected unless you sign in to Game Center, and then only your daily puzzle times go to Apple's leaderboards. The privacy policy says it in full.
Common questions
Ads, offline play and accounts.
Is there a sudoku app with no ads?
Yes. Sudoku Mori has no ads of any kind: no banners, no pop-ups, no videos, and no "watch this to get a hint". That includes the free version, and nothing in it pops up to sell you something: the one thing for sale is Sudoku Mori Full, an optional purchase you make once.
Can you play sudoku offline?
Yes. Sudoku Mori doesn't need a connection at all. Puzzles, lessons, progress and streaks all live on your device, so it plays the same on a plane, on the subway or in Airplane Mode.
What's the catch?
There isn't one. The download is free and stays free and ad-free: today's three daily puzzles, Classic Easy and Medium, hints that explain, the first two technique lessons and your forest of solved days, for as long as you like. Sudoku Mori Full is one optional purchase, made once and shared with your family, that adds past daily puzzles, Classic Hard, Expert and Master, Challenge mode, the other six lessons and practice puzzles. There's no subscription, and nothing else is ever sold.
Does an offline game need an account?
This one doesn't. No sign-up, no login, no email address, no profile. Open the app and start a puzzle.
How does progress survive without a server?
It's saved on your device. When you're signed in to iCloud, it also syncs through your own private iCloud, which I can't see. Settings → Your data → Backup & iCloud shows the sync status. The same screen can export a backup file for you to keep.
Are there ads in the free version only?
No. There are no ads in the free version or in Full. There's no "remove ads" purchase because there's nothing to remove: Full adds more puzzles and lessons, not fewer interruptions.
Does it still work with no connection after the first launch?
Yes. The puzzles are generated on your device and nothing downloads while you play, so the first launch and the hundredth work the same with or without a connection.
Where do I write if something is wrong?
Email me at support@sudokumori.com. There's no phone line or live chat, and every message gets read by a real person: me.
A puzzle, and nothing else.
Learn the rules of sudoku or the eight techniques, then play a puzzle that works the same in a tunnel as it does on Wi-Fi. Or see how it compares with other sudoku apps without ads.
Thanks. You'll get one email on launch day.
That didn't go through. Please try again.
One email on launch day, then your address is deleted.Privacy