The Best Sudoku App — Play Online & On Mobile
Sudoku App is the ultimate free Sudoku app — play instantly in your browser or download for Android and iOS. No registration, no intrusive ads, just pure Sudoku with six difficulty levels and smart hints that actually teach you solving techniques.
Why Sudoku App Is the Best Sudoku App
Most sudoku apps are packed with ads, microtransactions, and unnecessary features that get in the way of solving. Sudoku App takes the opposite approach — a clean, distraction-free interface inspired by the NYT Games design philosophy. Every feature serves the puzzle, not the business model.
6 Difficulty Levels
From Easy (36-50 clues) to Extreme (20-24 clues). Whether you're a complete beginner or a seasoned solver, there's a challenge waiting for you.
Smart Hints
Our sudoku puzzle app includes a 9-technique hint engine that shows you the reasoning behind each move — not just the answer. Learn Last Free Cell, Hidden Pairs, Pointing Pairs, and more.
Daily Challenge
Play the same puzzle as thousands of players worldwide. New date-seeded puzzle every day. Track your streak and compete on the leaderboard.
Killer Sudoku
Master the cage-sum variant. Our sudoku game app includes both Classic and Killer modes with automatic cage generation.
Works Offline
Install as a Progressive Web App and play without an internet connection. Your progress saves locally — no account needed.
7 Languages
Play in English, Chinese, Japanese, French, German, Spanish, or Portuguese. Our free sudoku app speaks your language.
Play Sudoku App Online — No Download Required
You don't need to install anything to start playing. Our sudoku app online works directly in your browser on desktop, tablet, or phone. The web version includes every feature of the mobile app:
- Full keyboard support (arrow keys, 1-9, undo/redo)
- Notes mode with per-cell candidate display
- 3-layer cell highlighting (row/column/box + same-number)
- Auto-save so you never lose progress
- Share puzzles with friends via link
- Built-in Sudoku solver with step-by-step explanations
Download the Sudoku App for Mobile
Looking for the best sudoku app download? Our mobile app gives you the same clean experience with added offline support and notification reminders for your daily puzzle.
Sudoku Puzzle App Features in Detail
Smart Hint System (9 Techniques)
Unlike other sudoku puzzle apps that just fill in a random cell, our hint engine analyzes the board using nine proven solving techniques and shows you which technique applies, which cells are involved, and the logical reasoning behind the next move. Learn techniques like:
- Last Free Cell & Last Remaining Cell (basic)
- Last Possible Number & Obvious Singles (intermediate)
- Obvious Pairs & Hidden Singles (intermediate)
- Hidden Pairs & Pointing Pairs (advanced)
- Obvious Triples (expert)
Browse all Sudoku techniques →
Statistics & Progress Tracking
Every free sudoku game app should help you improve. Track your best times per difficulty, completion rates, average solve time, current streak, and longest streak. All data stored locally on your device.
Clean, Minimalist Design
We designed this sudoku app for focus. The grid is the main character — no flashy animations, no auto-playing videos, no pop-ups. Just you and the numbers.
Frequently Asked Questions About Our Sudoku App
Is the Sudoku App mobile app free?
Yes! The free sudoku app is and will always be completely free to download and play. No hidden payments, no pay-to-win mechanics, no premium puzzle packs behind a paywall.
What makes this the best Sudoku app?
Three things set us apart: (1) a clean, ad-light interface that respects your focus, (2) a smart hint engine that teaches you nine solving techniques, and (3) pure deterministic puzzle generation — every puzzle is guaranteed to have exactly one solution.
Can I play Sudoku offline with this app?
Yes, our sudoku app works offline. Install it as a PWA (Progressive Web App) from your browser, and you can play without an internet connection. Your progress saves locally and syncs when you're back online.
Does this sudoku game app have daily puzzles?
Absolutely. Every day at midnight UTC, a new date-seeded puzzle is generated. Play the same board as thousands of other solvers worldwide and compare your time on the leaderboard.
Is there a Sudoku solver in this app?
Yes! Our built-in solver can solve any valid Sudoku puzzle step by step, showing you which technique was used at each stage. It's a great learning tool for improving your skills.