Comparison

Slitherlink vs Best Sudoku Ever

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Slitherlink

Solve logic puzzles by drawing a single loop around clues on a grid. Connect dots to form a continuous line, with no crossings or branches. Offers endless fun and intellectual challenge for puzzle enthusiasts.

Highlights
  • Draw a single continuous loop
  • Surround numbered clues
  • Pure logic, no math required
  • Weekly bonus puzzles
  • Multiple difficulty levels
  • Auto complete clues
  • Highlight link segment
Features
Read full description

Surround each clue with lines to form one single loop! Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to connect the dots surrounding each clue so that the number of lines equals the value of the clue and the lines around all clues form one continuous loop with no crossings or branches. Empty squares may be surrounded by any number of lines. Slitherlink are addictive loop-forming puzzles which were invented in Japan. Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages. The game features 2-finger tapping for quick zoom, auto complete clues setting and a link segment highlighting option to help to avoid creating separate loops. To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format. For more fun, Slitherlink contains no ads and includes a Weekly Bonus section providing an extra free puzzle each week. PUZZLE FEATURES • 200 free Slitherlink puzzles • Extra bonus puzzle published free each week • Multiple difficulty levels from very easy to extremely hard • Grid sizes up to 16x22 • Puzzle library continuously updates with new content • Manually selected, top quality puzzles • Unique solution for each puzzle • Hours of intellectual challenge and fun • Sharpens logic and improves cognitive skills GAMING FEATURES • No ads • Unlimited check puzzle • Unlimited Undo and Redo • Auto complete clues • Highlight link segment • Quick zoom using 2-finger tap • Concurrently playing and saving multiple puzzles • Puzzle filtering, sorting and archiving options • Dark Mode support • Graphic previews showing puzzles progress as they are being solved • Portrait and landscape screen support (iPad only) • Track puzzle solving times • Backup & restore puzzle progress to iCloud ABOUT Slitherlink have also become popular under other names such as Fences, Loop the Loop, Loopy, Suriza, Dotty Dilemma and Number Line. Similar to Sudoku, Kakuro and Hashi, the puzzles are solved using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.conceptispuzzles.com/index.aspx?uri=info/doc/220

About

Best Sudoku Ever

Features
Read full description

Classic Sudoku. Fill the grid, one number at a time. Every row, column and 3x3 block needs the numbers 1 through 9, each exactly once. No luck, no timer pressure unless you want one — just working out where each number has to go. 3 DIFFICULTIES • Easy — fewer blanks, more given numbers to start from • Medium — a balanced solve • Hard — the fewest given numbers, the most reasoning HINTS THAT EXPLAIN THEMSELVES A hint does not just point at a square — it names the number and tells you why it has to go there. "5 can only go here in this row." Press again for a different square. Watch one ad per hint; if no ad is available, the hint is given anyway so a slow connection never leaves you stuck. SEE THE BOARD CLEARLY Selecting a square lights up its row, column and block, so you can see every square that square affects. Squares holding the same number get a ring. Anywhere you have made a duplicate turns red immediately, ahead of every other highlight, so mistakes are never hidden. NOTES Turn on notes to jot down candidate numbers in small print. Confirm a real number and the same candidate clears itself from the notes in that row, column and block — no manual cleanup. 16 ACHIEVEMENTS Clear your first puzzle, then 10, 25, 50, 100. Clear each difficulty, then all three. Clear Easy in 3 minutes, Medium in 6, Hard in 10. Solve without a single hint — Hard unaided is its own achievement. Solve using notes. Beat your own best time. WHAT THE APP REMEMBERS Every clear is kept with its difficulty, time, hints used and whether notes were used. Your best time for each difficulty and your total number of clears are shown in Settings, and the full history is there too. A NUDGE EACH MORNING An optional reminder at 8:00. Turn it off with one tap. NO ACCOUNT No sign-in, no sync service, no server. Your records are stored on your device. ALREADY PLAYING? Your clear history carries over untouched, and achievements unlock retroactively from puzzles you have already cleared. The app is free and shows a banner ad. A full-screen ad appears when you leave a result screen, though not every time. Hints are supported by a short video ad, shown only after you agree to watch one.

Screenshots

Slitherlink4 screens
Best Sudoku Ever4 screens

Verdict

The call

The clearest difference is in-app purchases: Best Sudoku Ever at none against Slitherlink's 10. Best Sudoku Ever also leads on update cadence (every 4 days vs every 4 months). Slitherlink's advantage is ads (none vs shown) and iOS requirement (15.6 vs 26.0). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Slitherlink sells 10 one-off in-app purchases. Best Sudoku Ever asks for nothing beyond the download.

UpkeepUpdate frequency

Slitherlink ships an update every 4 months, Best Sudoku Ever every 4 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Slitherlink versus Best Sudoku Ever: the parameters behind the verdict, then further details
ParameterSlitherlinkBest Sudoku Ever
PriceFreeFree
Rating4.8 (461 ratings) — better—
Positive reviews89.5% of reviews—
Number of ratings461 — better—
Update frequencyEvery 4 monthsEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size7 MB6 MB
Age rating4+4+
DeveloperConceptis Ltd.ryuya matsuo

Bugs and requests

Slitherlink

Reported bugs

3 issues
  • App not loading properly for some users
  • Freezing issues on login screen
  • Incompatibility with older devices

Requested features

5 requests
  • Add a dark mode option
  • Implement coloring/marking tools for loop segments
  • Provide more free puzzle content
  • Reduce pricing for puzzle packs
  • Add a rewind/undo feature to go back to previous puzzle states

Best Sudoku Ever

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Slitherlink

One-time10
  • Easy Variety 1$1.99
  • Easy Variety - Large 1$1.99
  • Medium Variety 1$1.99
Show 7 more
  • Medium Variety - Large 1$1.99
  • Hard Variety 1$1.99
  • Easy Variety 2$1.99
  • Medium Variety 2$1.99
  • Hard Variety 2$1.99
  • Big & Easy 1$1.99
  • Big & Medium 1$1.99
None

Best Sudoku Ever

No in-app purchases

Questions

Is Slitherlink free?
Slitherlink is free to download, with in-app purchases available.
Is Best Sudoku Ever free?
Best Sudoku Ever is free to download, with no in-app purchases.
Do Slitherlink or Best Sudoku Ever have ads?
Best Sudoku Ever shows ads; Slitherlink does not.
Which is updated more often, Slitherlink or Best Sudoku Ever?
Slitherlink ships an update every 4 months, and Best Sudoku Ever every 4 days. Most recently, Slitherlink was updated on November 6, 2026 and Best Sudoku Ever on October 31, 2026.

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