Good Sudoku by Zach Gage

Good Sudoku by Zach Gage

Sudoku that loves you

1.3K ratings
495 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

Best Sudoku app on the App Store

I’ve tried many sudoku apps on the App Store, but once you’ve tried Good Sudoku it’s impossible to use any other app. It would be nice if the app worked offline, but it’s still a 5 star app. It would also be interesting to see total time spent across all of my games.

Buggy hints

I love this game but every now and then, when you select a number, the game shows the white squares incorrectly (I have screenshots of that helps). It would get 4 stars from me without this bug and 5 stars if you manage to fix the loading bug too!

super slow loading, no offline mode

love the interface of this app but the slow loading and lack of an offline play option really takes away from it.

Initial observations

I was looking for a sudoku game without ads. I would say that this is a bit more sophisticated than what I was using before. I am a beginner level and frankly did not realize there’s all kinds of different strategies which this app introduces you too. I like the fact that I can seamlessly play games between my iPad and phone. I’m an older adult looking for a little brain exercise and find sudoku very engaging. I don’t have any suggestions right now. Keep up the good work and I’m glad I found this sudoku app.

Just a word for anyone after you download it go through the learning exercises. And gain introduction if you’ve never done this before.
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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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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.