Good Sudoku by Zach Gage

Good Sudoku by Zach Gage

Sudoku that loves you

1.3K ratings
491 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • July 22, 2020
  • July 21, 2025

Features

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About

This app offers a unique Sudoku experience with AI-powered hints and tools to reduce busywork. It features over 70,000 high-quality puzzles, multiple game modes, and detailed technique explanations to help users learn and improve their skills.

AI-powered hint system
Over 70,000 high-quality puzzles
Busywork-reducing tools
Multiple game modes (Good, Arcade, Eternal)
Daily puzzle challenges with leaderboards
5 difficulty levels
Custom mode for importing and sharing puzzles
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What users say

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What's New in Good Sudoku by Zach Gage

1.0.30

July 21, 2025

Thanks so much for playing Good Sudoku! We've made some minor bugfixes and some backend updates to the daily tournament system.

1

In-App Purchases

$4.99

Full Game Unlock

Disable ads, unlock all modes and statistics.

User reviews

Was great TIL YOU BROKE IT

This is definitely my favorite Sudoku app to play. Excellent, clean UI, great teaching tools. BUT. With the last update, offline play is completely broken, sticking on the loading screen forever. Since one of my primary play times is on log plane flights with no net… yeah, it becomes worthless.

Also, scores for Classic mode are also broken, regularly giving me a score of… 1.

If fixed, this would once again be a 5-star app, as it was for years. But these are both major, annoying bugs that I personally submitted bug reports on over 6 months ago. So unless and until it gets fixed, I’m docking one star per bug.
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Internet required?

Can’t play this at the cottage anymore where I have no internet. This app is essentially dead.

Excellent Sudoku App, but No Offline Mode

Good Sudoku is among the best Sudoku apps on iOS, and I was happy to pay for the full version. Unfortunately, the lack of a proper offline mode is a deal breaker.

A Sudoku app, especially when paid, should be able to launch and play local puzzles without an internet connection. Online features like daily puzzles and leaderboards can understandably require internet access, but the core game shouldn’t.

The app is also currently plagued by loading-screen issues, with it sometimes getting stuck indefinitely. More concerningly, it appears to no longer be actively maintained, with the last update over a year ago despite these ongoing problems.

It’s a shame because the actual Sudoku experience is excellent. I’d gladly rate it higher if reliable offline support and the loading issues were fixed.
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Seems good if you already know Sudoku

But very frustrating for someone trying to learn the game. Hints only give one piece of information (and always something I already know). Why not allow for another hint that might reveal the logic needed to find a number.

Buggy

Could be great. I didn’t want to believe the negative reviews but I just lost a long streak as it would be stuck on the loading screen forever whenever starting the game with the only solution being to remove and redownload the app. There are a few minor bugs with the UI too but losing all scores because it needs periodic reinstalls is a particularly frustrating issue that needs to be fixed.
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Developer apps

User experience

🐞

Reported Bugs

5 issues

Daily classic mode scoring issues

Bug

Game Center icon overlapping the puzzle board

Bug

Inconsistent note-taking behavior

Bug

Puzzles marked as unsolvable when they are solvable

Bug

Progress not saving properly

Bug

Requested Features

5 requests

Ability to disable daily leaderboard and achievements

Feature

Option to turn off auto-note and highlighting features

Feature

Improved visibility of grid lines and notes

Feature

Redo/undo functionality

Feature

Dark mode option

Feature

FAQ

What is Good Sudoku by Zach Gage?

Good Sudoku is a digital application that transforms your device into an AI-powered Sudoku companion. It's designed to help users of all levels learn, enjoy, and improve their Sudoku-playing skills through intelligent hints, unique tools, and a vast library of high-quality puzzles.

What are the key features of this Sudoku app?

The app boasts an AI-powered hint system that adapts to your progress, over 70,000 meticulously generated puzzles, and tools designed to minimize tedious tasks. It also offers various game modes, adjustable difficulty levels, and the ability to import and share your own puzzles.

How does the AI hint system work?

The AI solver runs in the background as you play. It can analyze your current answers and notes to identify the specific solving technique you need to progress, offering continuous support to boost your skills and understanding of complex strategies.

Is this app free to play?

The application is free to download and play, offering a substantial amount of content. However, it does include in-app purchases, which may unlock additional features or content for users who wish to enhance their experience further.

Who is Good Sudoku by Zach Gage for?

This app is ideal for anyone interested in Sudoku, whether you're a complete beginner looking to learn the basics or an experienced player seeking challenging puzzles and advanced learning tools. It caters to those who appreciate a well-designed, educational, and engaging puzzle experience.