# Sudoku Master: Killer & Logic — Hints that teach each step

> Hints that teach each step (iPhone/iPad app by 金旭 张.)

- Source: https://appshunter.io/ios/app/sudoku-master-killer-and-logic/id6826015931 (this page in markdown: same URL + `.md`)
- Developer: [金旭 张](https://appshunter.io/developer/1623029267)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 43 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Malay, European Portuguese and 5 more
- Released: 2026-11-06
- Data updated: 2026-11-11

## What is Sudoku Master?

Sudoku that plays fair. Every puzzle is rated by a logical solver according to the techniques it actually needs, always has a single solution, and when you get stuck the hint explains not just what to place, but why.

FIVE LEVELS GRADED BY TECHNIQUE
• Easy: obvious and hidden singles
• Medium: locked candidates
• Hard: obvious pairs
• Expert: hidden pairs, triples and X-Wing, still no guessing
• Extreme: XY-Wing, Swordfish and beyond
Difficulty comes from the logic you need, not from how many clues are removed.

FIVE WAYS TO PLAY
• Classic 9×9 Sudoku
• Killer Sudoku: dashed cages whose digits add up to the number in the corner, with an interactive tutorial
• Windoku: four extra shaded windows that must also hold 1–9
• 6×6 for a quick break, 12×12 for a bigger challenge
Every mode has its own save slot and statistics, and the home screen picks up the mode you played last.

HINTS THAT TEACH
A hint names the next logical step (singles, locked candidates, pairs, triples, X-Wing, XY-Wing, Swordfish, and cage sums and the rule of 45 in Killer Sudoku), highlights the cells that justify it, and walks through any eliminations before the placement. Wrong entries are pointed out first, for free.

DAILY CHALLENGE
A new puzzle every day, the same for every player. Difficulty rises through the week, a monthly calendar tracks your progress, and finishing every day of a month earns a trophy.

COMFORTABLE TO PLAY
• One-tap auto notes, fully undoable
• Number-first input: long-press a digit to lock it, then tap cells
• Auto-removing notes, undo, pause and timer
• Conflict, same-number and region highlighting
• Dark mode and 15 languages
• Works fully offline, no account needed

STATS AND ACHIEVEMENTS
Win rate, best time, streaks and best score for every mode and level, 24 achievements, and confetti when you finish.

SUDOKU PREMIUM (AUTO-RENEWABLE SUBSCRIPTION)
Every mode from Easy to Expert, plus every daily challenge, is free, and each Extreme level comes with one free game to try. Sudoku Premium unlocks Extreme in every mode, gives you unlimited hints in every game and removes ads.
• Monthly subscription with a 7-day free trial for new subscribers; the price is shown in the app
• Payment is charged to your Apple ID account at confirmation of purchase, or when the free trial ends
• The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period
• Manage or cancel it in your App Store account settings

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.douzhuan.tech/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Sudoku Premium Monthly | $1.99 | per month |


## Is Sudoku Master safe?

Not enough ratings yet to assess Sudoku Master.

## Is Sudoku Master legit?

Sudoku Master: Killer & Logic appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sudoku Master is 63 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.2.0 — 2026-11-09

• Bug fixes and performance improvements

### 1.1.0 — 2026-11-08

• Classic Sudoku now has its own card on the home screen
• Continue and New Game at the bottom of the home screen follow the mode you played last
• Now in 15 languages: English, Chinese, French, Spanish, Portuguese, Russian, Arabic, Japanese, Korean, Thai, Vietnamese, Malay, German, Italian and Dutch
• Long hints now scroll on small screens

### 1.0.1 — 2026-11-07

No release notes.

## More apps by 金旭 张

- [JJ INC](https://appshunter.io/ios/app/jj-inc/id1623030265)
- [Jigsaw Lab: HD Puzzle Games](https://appshunter.io/ios/app/jigsaw-lab-hd-puzzle-games/id6825130488)

All apps by 金旭 张: https://appshunter.io/developer/1623029267

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-11.*