mossgrid
Fill every row, column and box with 1 to 9 on a quiet board of moss and river stones. Every puzzle has one solution you can reach by logic alone, a wrong digit never ends your game, and no ad ever breaks your concentration.
Free · Works offline · No account · Easy to Expert · Daily Stone
That is a review of one of the biggest sudoku games on Google Play, with hundreds of people agreeing. We read the low-star reviews and the same complaints kept coming up.
Ads in the middle of a puzzle. Videos that pop up while you are solving, even as a "reward" for finishing a digit.
Mistake limits. Three wrong digits and the game is over, unless you watch something to carry on.
Rewards that never arrive, and heavy data use. Videos watched for nothing, and hundreds of megabytes of data gone in a few days.
A wrong digit stays on the board until you find it. Repeated digits glow red as you play, and Check rings every wrong digit when you ask. The first check of each puzzle is free, and undo is always free.
Every puzzle is checked by a solver that only makes forced moves, so it has exactly one solution and you never have to guess. Levels climb from Easy through Medium and Hard to Expert, and pencil notes tidy themselves as you place digits.
A hint fixes one of your mistakes first. If there are none, it fills the cell that logic finds next, so you can see where to look.
Never during a puzzle, never a banner. A short ad can appear between puzzles now and then. Videos for coins only play when you tap them, and pay as soon as they finish.
From Google Play. No account.
Its row, column and box light up.
Or turn on Notes to pencil it in.
Finished rows and boxes glow green.
The real app: placing digits, pencil notes, Check catching a mistake, a hint and a finished grid.
The board is a 9×9 grid split into nine 3×3 boxes. Fill the empty cells so that every row, every column and every box contains the digits 1 to 9 exactly once. Some digits are given; you work out the rest.
Yes. It's free to download and play, supported by ads. There's nothing to buy.
None during a puzzle and no banners. A short ad can appear between puzzles, at most every third break and never within a couple of minutes of the last one. Videos for coins only play when you tap them.
No. Every puzzle is checked by a solver that only makes forced moves (singles, and locked candidates on Expert), so there is always a next cell you can work out and exactly one solution.
Yes. No Wi-Fi or mobile data needed to play.
Your progress stays on your phone (and in your own Android backup). Ads come from Google AdMob, which uses your advertising ID. The app has no analytics and no account. Details are on the privacy page.