Simply Sudoku
Thousands of unique puzzles — each with exactly one solution — and the thoughtful touches that make solving a pleasure, without the pop-ups, ads, or sign-ups that ruin it.
Android · iOS · Windows · Free · No ads, ever
Features
Big, high-contrast digits on a clean grid. Selecting a cell highlights its row, column, box, and every matching number, so the board is effortless to scan. Given clues and your own entries are always easy to tell apart.
Pencil in candidates with a tap of the notes button. The active number is framed so you never lose your place. Prefer a safety net? Turn on red highlighting for wrong entries — or switch it off for a pure, no-hints challenge.
From a relaxed Easy to a proper Expert challenge. Every single puzzle is generated and verified to have exactly one solution, so you can always get there by logic alone — never by guessing.
Stuck? A hint reveals one correct digit in green — then you decide whether to keep it or undo it. Hints are limited per game, so they help when you need them without doing the puzzle for you. Unlimited undo/redo has your back either way.
A few simple switches — highlight wrong numbers, resume an unfinished game the next time you open the app, or allow screenshots — and that’s it. No menus of upsells. A game timer and per-difficulty best times give you something to beat, and everything is saved privately on your device.
Set the mood right from the main screen. Choose an app theme (light, dark, warm, high-contrast and more) and, separately, one of 12 board looks that recolour just the 9×9 grid — Classic, Midnight, Paper, Mint, Slate, Rose, Lavender, Sunset, Forest and more. Mix and match to taste; your choices are remembered next time.
Board looks
Recolour just the puzzle grid — independently of the app theme. From the crisp Classic and High-Contrast to the calm Paper, Mint and Slate, or the dark Midnight, Forest and Charcoal.
The promise
Simply Sudoku does one thing: it lets you enjoy the puzzle. It never interrupts you, never asks you to sign up, and never phones home.
Are you tired of “free” games that flash an ad after every move, freeze the puzzle to sell you a hint, or nag you to subscribe? Simply Sudoku carries none of that. It’s built on one idea — your time and attention are yours — so there’s nothing to sit through, nothing to sign up for, and nothing collecting your data in the background.
Download
Now on Google Play and the App Store — free, with no ads and no tracking. A Windows version is coming soon.
The #1 way to help — bigger than a donation
A quick rating and review is the single most powerful thing you can do to help — and it’s completely free.
Simply Sudoku has no ads and no advertising budget. It can’t pay to appear on the app stores — it only gets noticed when players like you leave a review. Every rating pushes it higher in search, helps new people discover an honest, ad-free game, and keeps it growing without spending a cent on ads. Great reviews are our advertising.
Already left a review? Thank you — it genuinely makes the difference. Telling a friend helps just as much. 🙂
Live now on both Google Play and the App Store.
Support the work
A lot of apps lure you in with the word “free,” then charge you to unlock features, remove the ads, or simply to stop the nagging. Simply Sudoku will never do that — no in-app purchases, no paywalls, no pop-ups begging for money. It’s free, and it stays free.
If it’s become part of your day, please consider a small donation. It isn’t required and never will be — it simply helps cover the programming tools, app-store fees, and hosting that keep Simply Sudoku free and ad-free for everyone. Any amount, however small, genuinely helps.
♥ Make a donationSecure payment via Stripe. One-time, no strings attached.
Can’t donate right now? No problem at all. You can help just as much for free: please leave a review, tell others about the app, and spread the word about Simply Sudoku. And if it brightened a few minutes of your day, a quick note to say so is always welcome.