Sudoku Royale vs nerByte Sudoku: Hints, Offline Play and Ads

nerByte Sudoku and Sudoku Royale are both sudoku apps that try to explain moves instead of just revealing them. nerByte's listing promises explanatory hints with step-by-step instructions, play that works fully offline, landscape and portrait, and a long list of settings; it is free and sells a one-time Sudoku No Ads purchase at $7.99. Sudoku Royale has no ads and nothing to buy, goes two levels past Expert and adds lessons and drills, but its hints need an internet connection and it has no undo. If you mostly play on planes or underground, nerByte is the safer choice. If you want a structured way up to the hardest puzzles without paying, Royale is.

The App Store facts

From each app's US App Store listing, checked October 26, 2026. Prices and paid items change, so check the listing before you buy.

nerByte has been on the App Store since 2020 and has 24,061 US ratings; Sudoku Royale launched in 2026 and has 11. One more date worth noticing: nerByte's most recent update on the US listing is from February 25, 2025. That does not make it worse to play, but it means new features are not arriving often.

Feature by feature

nerByte's column comes from its App Store listing and reviews.

Two kinds of explanatory hint

nerByte's listing describes "a detailed explanation of the requested hint with step-by-step instructions". You ask for help and it walks you through the deduction. One long-time reviewer on its App Store page adds a caveat: pressing hint also fills in and corrects your notes, and if whittling down candidates yourself is the part you enjoy, that takes some of it away.

Sudoku Royale's hint is deliberately smaller. It only appears in Practice, after about 90 seconds without progress, and it tells you the name of the technique and which cell to look at, without the digit and without touching your notes. Tap through and you land on the lesson for that technique, whether it is a hidden single or a pointing pair. The teaching mostly happens elsewhere: the Journey covers one technique per chapter across 88 levels, and the Dojo drills single patterns against the clock, up to Swordfish and XY-Wing. The catch is that Royale's hints and Dojo need a connection, while nerByte's hint works wherever you are.

Offline play, precisely

nerByte's listing says "offline playable without restrictions", and that is a real strength. Sudoku Royale is more patchy. Practice works offline using the puzzles already downloaded for your level, and when those run out it asks you to connect. Journey levels play offline once the map has loaded. The Daily Challenge, Dojo, Belts, hints and live games need the internet. If you want sudoku for long flights, our offline sudoku guide compares the apps that handle it best.

Ads and the one-time purchase

nerByte does not carry Apple's "Contains advertising" note in its age rating, but its listing sells Sudoku No Ads at $7.99, and a reviewer mentions wanting to pay to remove the ads, so expect ads in the free version. It is a one-time purchase, not a subscription. Sudoku Royale has no ads to remove and no purchases at all; the only shop sells avatar outfits for shurikens earned by solving. Its listing also has no "Data Used to Track You" section, while nerByte's does.

Settings and comfort

nerByte's listing leans on customization: four color themes, adjustable number size, Display Zoom support for larger controls and "extensive settings". One reviewer singles out an option to lock input to one number and tap every cell where it goes; another praises being able to play without the app pointing out mistakes. Sudoku Royale has fewer switches: three themes, sound and music toggles, and Highlight Same Number. It also supports number-first input and slide-to-select, but mistake checking cannot be turned off.

Where nerByte is the better pick

• You play offline a lot. Everything works without a connection, hints included.
• You want to play the paper way. A reviewer says you can play without the app flagging mistakes. Royale always checks.
• You play in landscape or want a different language. nerByte supports both orientations and 24 languages; Royale's app is English only and portrait on iPhone.
• You like tuning the board. Themes, number size and input options go further than Royale's.

Where Sudoku Royale is the better pick

• No ads without paying. Nothing to remove, nothing to buy.
• Harder puzzles. Master and Extreme sit above Expert; nerByte tops out at Expert.
• A course, not just hints. Journey chapters, Dojo drills and a coach that picks positions from your own games.
• A daily puzzle to compare. The Daily Challenge has streaks, an archive and a leaderboard with friends and the world.

Which should you choose?

Choose nerByte if you want a configurable, fully offline app and don't mind paying once to remove ads. Choose Sudoku Royale if you want to climb past Expert with lessons along the way, and you are usually online when you need a hint. Since both are free to try, download Sudoku Royale and play a few puzzles in each. For apps that teach, see the best sudoku apps for learning techniques; for more options, the nerByte Sudoku alternatives and every matchup on the comparisons page.