Sudoku.com vs Good Sudoku: Which App Is Better?

Sudoku.com and Good Sudoku are two of the most popular sudoku apps on iPhone, but they take very different approaches to the same game. Sudoku.com is the volume play — thousands of puzzles, daily challenges, seasonal events, and a free tier supported by ads. Good Sudoku is the craft play — AI-powered hints that teach techniques, automatic pencil marks, and a one-time purchase with no ads at all. This comparison breaks down every meaningful difference to help you decide which app fits your solving style. We will also cover Sudoku Royale as a third option for players who want something neither app offers: real-time competitive multiplayer.

Feature Comparison

Sudoku.com: The Volume Approach

Sudoku.com is one of the most downloaded sudoku apps in the world, and for good reason. It does the basics well — clean interface, reliable puzzle generation, and a massive library spanning multiple difficulty levels. The daily challenge system gives you a reason to open the app every day, and seasonal events add variety to the routine.

The puzzle library is enormous. With thousands of puzzles across Easy, Medium, Hard, and Expert difficulties, you are unlikely to run out of content. The app also tracks your statistics — solve times, completion rates, streaks — which adds a layer of personal progression that keeps solo play engaging over months.

The free tier is fully functional but ad-supported. You will see interstitial ads between puzzles and banner ads during solving. The Premium subscription removes ads and unlocks additional features like advanced statistics and themes. The subscription model means ongoing costs rather than a one-time payment.

Sudoku.com is available on iOS, Android, and web, making it the most accessible option. You can start a puzzle on your phone and continue on your tablet or browser. For players who want a reliable, no-frills sudoku app with a deep puzzle library, it is a solid choice.

Good Sudoku: The Teaching Approach

Good Sudoku, designed by Zach Gage and Jack Schlesinger, is not just a sudoku app — it is a sudoku tutor. The AI hint system is the centerpiece. When you request a hint, Good Sudoku does not just reveal the answer. It shows you the technique that leads to the answer — hidden singles, naked pairs, pointing pairs, X-Wings, and more. Over time, this teaches you to spot these patterns independently.

The automatic pencil mark system eliminates the tedious bookkeeping that slows down many solvers. Instead of manually tracking candidates for every empty cell, Good Sudoku maintains and updates them automatically. When you place a number, related pencil marks update across the entire board instantly. This lets you focus on the logical deduction rather than the bookkeeping.

The design is distinctive. Colorful gradients, smooth animations, and smart highlighting make the logical structure of the puzzle visible. Good Sudoku uses color to show connected cells, remaining candidates, and available techniques in ways that genuinely help you see patterns. It is one of the most visually intentional puzzle apps available.

Good Sudoku's camera scan feature lets you import printed puzzles from newspapers, books, or magazines. Point your camera at a sudoku grid, and the app digitizes it with all of its AI assistance available. This is a unique feature that no other major sudoku app offers.

The one-time purchase price of approximately $4.99 buys you everything with no ads and no recurring costs. For players who value learning and clean design over raw puzzle volume, Good Sudoku is excellent value.

Hints: Reveal vs. Teach

The hint systems in these two apps represent fundamentally different philosophies. Sudoku.com's hints are utilitarian — they reveal a cell's value or highlight an error. They solve your immediate problem but do not explain why. You learn that cell R3C5 is a 7, but not what technique would have led you to that conclusion.

Good Sudoku's hints are educational. They identify the easiest available technique and walk you through it visually. If a hidden single exists in box 4, the hint highlights the relevant cells, shows which candidates have been eliminated and why, and reveals the logical chain that makes the placement certain. You learn the technique, not just the answer.

For players who already know solving techniques and just want to play, Sudoku.com's approach is fine. For players who are actively trying to improve, Good Sudoku's teaching hints are significantly more valuable.

Monetization: Subscription vs. One-Time Purchase

Sudoku.com's free tier is generous — you can play unlimited puzzles across all difficulty levels. The trade-off is ads. Interstitial ads appear between puzzles, and you may see banner ads during solving. The Premium subscription (roughly $9.99/year or $3.99/month) removes ads and adds features. Over time, the subscription cost exceeds Good Sudoku's one-time price.

Good Sudoku charges approximately $4.99 once. No ads ever, no subscription, no in-app purchases. You pay once and own everything. For players who dislike subscriptions or ads, this is appealing.

If you want to spend nothing, Sudoku.com's free tier works. If you are willing to pay once for a premium experience, Good Sudoku offers better long-term value. And if you want free with no ads at all, Sudoku Royale is completely free with no ads and no in-app purchases — though its focus is competitive multiplayer rather than solo solving.

Platform Availability

Sudoku.com has a clear advantage in platform support. It runs on iOS, Android, and web browsers, making it accessible to essentially everyone. Good Sudoku is iOS only — if you use an Android phone, it is not an option.

For iPhone users, both apps are available and this is not a deciding factor. For Android users or those who want cross-platform access, Sudoku.com is the only choice between these two.

Who Should Choose Sudoku.com?

• You want a massive puzzle library with daily challenges and events
• You prefer a free app and do not mind ads
• You use Android or want cross-platform access
• You enjoy tracking statistics, streaks, and personal bests
• You already know solving techniques and just want puzzles to solve
• You like seasonal events and daily variety

Who Should Choose Good Sudoku?

• You want to learn solving techniques through AI-powered teaching hints
• You prefer automatic pencil marks that reduce busywork
• You value beautiful, intentional design
• You want to import printed sudoku via camera scanning
• You prefer a one-time purchase with no ads or subscriptions
• You are on iOS and prioritize quality over quantity

The Multiplayer Alternative: Sudoku Royale

Neither Sudoku.com nor Good Sudoku offers multiplayer. If you have ever wished you could race another player on the same puzzle, neither app will satisfy that itch. Sudoku Royale fills this gap with real-time Battle Royale (2-10 players with elimination rounds) and Duel (1v1) modes, both with Glicko-2 ranked matchmaking.

Sudoku Royale's slide-to-select input is the fastest mobile sudoku input method available — faster than the tap-based input in both Sudoku.com and Good Sudoku. It is also completely free with no ads, no subscriptions, and no in-app purchases. For players who want competitive play or the fastest input experience, it is worth trying alongside whichever solo app you prefer.

For a deeper look at how Sudoku Royale compares to each app individually, see our Sudoku Royale vs Sudoku.com and Sudoku Royale vs Good Sudoku comparisons. For a broader overview, see best sudoku apps in 2026.