# Sudoku Duo: Classic & Diamond — Daily puzzles & logical hints

> Daily puzzles & logical hints (iPhone/iPad app by Wenbin lei.)

- Source: https://appshunter.io/ios/app/sudoku-duo-classic-and-diamond/id6797330383 (this page in markdown: same URL + `.md`)
- Developer: [Wenbin lei](https://appshunter.io/developer/1787331500)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 17 MB
- Languages: Canadian English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more
- Released: 2026-08-31
- Data updated: 2026-10-31

## What is Sudoku Duo?

Sudoku Duo brings two views to the classic number puzzle: a familiar square grid and an adjustable Diamond board with a signature 30° view. Solve daily Sudoku, follow the logic and discover your next technique.

A BOARD THAT FITS YOU
Choose Diamond or classic style and save separate portrait and landscape preferences. In landscape, controls move beside the board to give the puzzle more room. Hold a cell to inspect nearby numbers without changing your answer.

SEE WHY THE NEXT MOVE WORKS
Hints guide you through observation, reasoning and the conclusion. Follow the highlighted evidence, compare candidates and reveal the answer when you are ready.

LEARN TO FIND IT YOURSELF
Practice spotting the right cell and digit, instead of following a marked answer. Explore techniques from singles and pairs to advanced patterns. Ask for a clue when you need one, then try a new exercise independently.

MAKE YOUR PROGRESS VISIBLE
Earn achievements through solving, daily challenges and technique practice. See exactly what each milestone requires and jump straight into the matching activity.

FIND YOUR FLOW
Double-tap an empty cell to open a nearby number pad. Add candidate notes, highlight related cells, undo a move, or pause whenever you need. Gentle tips on the actual interface introduce the gestures as you play.

A LITTLE CHALLENGE, EVERY DAY
Take on the daily puzzle or choose from six difficulty levels, Very Easy to Master. Track your progress and achievements, or bring in another puzzle from text or a photo.

PLAY AT YOUR PACE
Choose from 50 language and region options in Settings, or follow your device language. Switch without losing your current puzzle. Play offline without creating an app account. Progress can sync privately through iCloud. Choose light or dark appearance and use larger text on iPhone and iPad.

All puzzles, difficulty levels, hints, lessons and import tools are available in the free version. It may show portrait banners and an interstitial after a completed or ended game. One optional lifetime Premium purchase removes ads. No subscription.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Premium | $13.99 | one-time |


## Is Sudoku Duo safe?

Not enough ratings yet to assess Sudoku Duo.

## Is Sudoku Duo legit?

Sudoku Duo: Classic & Diamond appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sudoku Duo is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.3 — 2026-09-23

• Play in 50 language and region options, with carefully revised interface text and explanations.
• Change language instantly in Settings, or follow your device language.
• Enjoy clearer number, date and plural formatting, plus improved Arabic, Hebrew and Urdu layouts.
• Keep your current puzzle, notes and undo history when switching languages.

### 1.2 — 2026-09-21

Sudoku: Diamond is now Sudoku Duo. Your saved progress and existing Premium purchase stay with you.

• Step-by-step hints explain what to observe, why it matters and what follows.
• More challenging technique practice asks you to find the cell and digit yourself.
• A redesigned achievement collection connects milestones to daily puzzles, play and learning.
• Landscape boards fill more of the screen, with clearer digits adapted to each board angle.
• Refined navigation, controls and translations across all 11 language versions.

### 1.1 — 2026-09-08

A fresh perspective in 1.1:
• Refined multi-angle boards and a larger landscape layout with controls beside the puzzle.
• Improved double-tap keypad placement and touch handling near board edges.
• Hold-to-read assistance and separate portrait/landscape preferences.
• Contextual tips that teach gestures directly on the board.
• In-app feedback with saved drafts and optional review prompts.
• Improvements to hint layouts, text scaling, rotation and ad consent recovery.

### 1.0 — 2026-09-01

No release notes.

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## More apps by Wenbin lei

- [calculator DUO](https://appshunter.io/ios/app/calculator-duo/id6739860116)
- [Unit Converter: Daily Units](https://appshunter.io/ios/app/unit-converter-daily-units/id6797329964)
- [Gratuity Lab: Tip Calculator](https://appshunter.io/ios/app/gratuity-lab-tip-calculator/id6797330328)

All apps by Wenbin lei: https://appshunter.io/developer/1787331500

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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 2026-10-31.*