# Tetsudoku — Sudoku mastery, day by day

> Sudoku puzzle app with guided learning and automatic candidate tracking. (iPhone/iPad app by Anodized Software.)

- Source: https://appshunter.io/ios/app/tetsudoku/id6762089912 (this page in markdown: same URL + `.md`)
- Developer: [Anodized Software](https://appshunter.io/developer/789609150)
- Category: Games, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 78 MB
- Languages: American English
- Released: 2026-07-17
- Data updated: 2026-10-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/tetsudoku/id6762089912/reviews.md

## What is Tetsudoku?

Every Sudoku has a logical path to the end. Tetsudoku teaches you to find it. Four new puzzles arrive each morning, one per difficulty: Easy, Medium, Hard, and Expert. Twenty more come each week. The archive holds every past puzzle, ready to revisit.

Stuck on a move? Most apps hand you the answer. Tetsudoku shows you the next logical step, names the cells involved, and explains the strategy behind it. Head to the Learn section for fifteen solving strategies, each with a full explanation and practice puzzles. Over time, you need fewer hints.

Tetsudoku tracks candidates for you. No penciling in numbers by hand: it computes every possible value for every cell automatically. Tap to highlight all cells that can hold a given digit. Find cells with exactly two candidates in one tap. Choose any combination of values and see which cells share them. Less busywork, more solving.

Spotted a puzzle in the newspaper? Enter it by hand and solve it right here. Unlock Tetsudoku Unlimited to generate custom puzzles at any difficulty, any time.

Stats track your best and average solve times for each difficulty, puzzles finished, and hints used. Watch yourself improve.

Easy puzzles are always free. Tetsudoku Unlimited is a single one-time purchase that unlocks Medium, Hard, and Expert puzzles plus unlimited puzzle generation.

## Key features

- Daily puzzles (Easy, Medium, Hard, Expert)
- Logical step-by-step hints
- Fifteen solving strategies with practice
- Automatic candidate tracking
- Custom puzzle generation
- Solve time and progress tracking

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tetsudoku Unlimited | $4.99 | one-time |



## Frequently asked questions about Tetsudoku

### Does Tetsudoku have ads?

No, Tetsudoku does not contain advertisements. The app is free to use with optional in-app purchases for advanced features.

### What devices does Tetsudoku support?

Tetsudoku is available for iPhone and iPad devices, offering a seamless experience across Apple's mobile platforms.

### How does Tetsudoku help me learn Sudoku strategies?

Tetsudoku features a dedicated 'Learn' section with fifteen distinct solving strategies. Each strategy is fully explained and comes with practice puzzles to reinforce your understanding.

### What is the age rating for Tetsudoku?

Tetsudoku has an age rating of 4+, making it suitable for a wide range of players interested in puzzle games.

### How often are new puzzles released in Tetsudoku?

Four new puzzles are released daily, one for each difficulty level (Easy, Medium, Hard, and Expert). Additionally, twenty new puzzles are added to the weekly collection.

### What does Tetsudoku Unlimited offer?

Tetsudoku Unlimited is a one-time purchase that unlocks Medium, Hard, and Expert puzzles. It also grants unlimited custom puzzle generation at any difficulty level.

### Can I enter my own Sudoku puzzles into Tetsudoku?

Yes, you can manually enter Sudoku puzzles you find elsewhere, such as in newspapers, and solve them directly within Tetsudoku.

### How does Tetsudoku track my progress?

Tetsudoku provides detailed statistics to track your improvement. This includes your best and average solve times for each difficulty, the total number of puzzles finished, and the number of hints used.

## Version history (last 3 releases)

### 1.0.2 — 2026-09-26

Bug fixes and performance improvements

### 1.0.1 — 2026-07-21

- Sharper, more accurate hints with clearer wording throughout.
- Refined the wing hint walkthrough: the involved cells now stand out with a clean red outline instead of dimming the rest of the board, and a redundant step was removed.
- Improved the look of hint outlines, including a fix for a stray black edge on cells at the board's border.
- Polished the translations across the Learn strategy guides.

### 1.0 — 2026-07-17

No release notes.

## Apps similar to Tetsudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku Istind](https://appshunter.io/ios/app/sudoku-istind/id6791594354) | — | Free | Games |
| [Sudoku - Master the Logic](https://appshunter.io/ios/app/sudoku-master-the-logic/id6762118465) | — | Free | Games |
| [Sudoku Mentoring: Learn Sudoku](https://appshunter.io/ios/app/sudoku-mentoring-learn-sudoku/id6785560230) | 5.0 (1) | Free | Games |
| [Sudojo](https://appshunter.io/ios/app/sudojo/id6739454562) | 5.0 (1) | Free | Games |
| [Sudoku - No Ads .](https://appshunter.io/ios/app/sudoku-no-ads/id6793156691) | — | Free | Games |
| [Sudoku's Revenge](https://appshunter.io/ios/app/sudokus-revenge/id6636483257) | 5.0 (3) | Free | Games |

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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 2026-10-03.*