Comparison

Sudoku by Skillkeep vs Sudoku Flow

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

Head to head
About

Sudoku by Skillkeep

Features
Read full description

Welcome to Sudoku, kept simple. This is an ad-less standalone Sudoku app from the makers of Skillkeep, built for people who want a calm, focused puzzle experience without distractions. What you’ll love • Ad-free play. No banners, no nag screens, no pop-ups, no interruptions. • Play as much as you want. Yes, really. No "pay to play". • Clean, fast interface designed to keep you in the zone. • Great for a quick break or a longer sit-down session. • Ideal for both newcomers and experienced Sudoku players. Why “by Skillkeep”? Skillkeep is about consistent practice and improvement over time. Sudoku is a perfect daily ritual to keep your mind sharp; and this app is our simple, relaxing companion to that mission. If you’re looking for Sudoku that respects your attention, you’re in the right place.

About

Sudoku Flow

Enjoy classic Sudoku puzzles without any advertisements or data tracking. Solve grids at your own pace with a clean, focused interface. Support an independent studio with a one-time purchase to unlock all content.

Highlights
  • No ads, ever
  • No data tracking
  • Solve at your own pace
  • Mistake highlighting toggle
  • Hint system
  • Multiple difficulty levels
  • One-time purchase unlocks
Features
Read full description

Sudoku Flow is pure sudoku — free to start, ad-free, thought-provoking and calming. A minimal board, a number puzzle with nothing between you and the logic. Optimized for iPad and iPhone Duo. Just you, the grid, and the quiet pleasure of thinking clearly. DEEP GAMEPLAY Over 250 puzzles, each solvable, and with increasing difficulty. Hints to help you if you get stuck. Six difficulty packs run from Starter to Master. A NEW PUZZLE EVERY DAY Come back for a free daily sudoku. Keep a streak going if you like — it's a quiet counter, never a guilt trip. BEAUTIFUL ON iPAD A layout built for the big screen: the board and controls sit in one comfortable centered column, in portrait or landscape, and the grid scales beautifully to iPad. The same calm game, with more room to think. WHY SUDOKU FLOW - Comfortable input with pencil-mark notes. - Hints that teach the method — "this row forces a 7" — rather than giving away the answer. - Technique-based grading, so every puzzle is rated by the thinking it asks of you. - The first puzzles and the daily puzzle are free. - Plays offline, wherever your day takes you. WHAT WE BELIEVE - No ads, ever. - Privacy-first. No data monetization. - Exercising your mind through puzzles is fun. - From a studio of puzzle aficionados who believe games should be worth your time. PART OF THE PUZZLE MASTER COLLECTION Sudoku Flow is part of the Puzzle Master Collection, our growing family of calm, ad-free puzzle games. Get the free Puzzle Master Collection bundle on the App Store in one download, and the More Games screen will introduce you to the rest. When you want more, a one-time purchase unlocks the full game for good — or choose the optional Puzzle Master Pass. In your language — fully localized in English, Spanish, French, German, Italian, Portuguese, Japanese, Korean, Simplified and Traditional Chinese, Hindi, and Arabic. SUBSCRIPTION INFORMATION Puzzle Master Pass (optional auto-renewable subscription): available monthly or annually — the exact price for your region is shown at purchase. Unlocks the full versions of the Puzzle Master games while active. Renews automatically unless canceled at least 24 hours before the end of the current period; manage or cancel any time in your Account settings. Restore Purchases is available on the store screen. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://jcy.studio/privacy

Screenshots

Sudoku by Skillkeep4 screens
Sudoku Flow4 screens

Verdict

The call

The clearest difference is in-app purchases: Sudoku by Skillkeep at none against Sudoku Flow's 4. Sudoku by Skillkeep also leads on iOS requirement (13.0 vs 17.0). Sudoku Flow's advantage is update cadence (every 8 days vs monthly). On price, ads 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. Sudoku Flow sells 4 in-app purchases, starting at $1.99 per 7 days. Sudoku by Skillkeep asks for nothing beyond the download.

UpkeepUpdate frequency

Sudoku by Skillkeep ships an update monthly, Sudoku Flow every 8 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 6 level
Sudoku by Skillkeep versus Sudoku Flow: the parameters behind the verdict, then further details
ParameterSudoku by SkillkeepSudoku Flow
PriceFreeFree
Rating—4.5 (4 ratings) — better
Number of ratings—4 — better
Update frequencyMonthlyEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size19 MB12 MB
Age rating4+4+
DeveloperBitsationalJCY Advisors

In-app purchases

None

Sudoku by Skillkeep

No in-app purchases

4 purchases

Sudoku Flow

Subscriptions2
  • Puzzle Master Pass — Weekly$1.997 Days
  • Puzzle Master Pass — Yearly$49.991 Year
One-time2
  • All Packs$2.99
  • Puzzle Master$12.99

Questions

Is Sudoku by Skillkeep free?
Sudoku by Skillkeep is free to download, with no in-app purchases.
Is Sudoku Flow free?
Sudoku Flow is free to download, with in-app purchases available.
Do Sudoku by Skillkeep or Sudoku Flow have ads?
Neither Sudoku by Skillkeep nor Sudoku Flow shows ads.
Which is updated more often, Sudoku by Skillkeep or Sudoku Flow?
Sudoku by Skillkeep ships an update monthly, and Sudoku Flow every 8 days. Most recently, Sudoku by Skillkeep was updated on October 31, 2026 and Sudoku Flow on October 31, 2026.

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