# Good Sudoku by Zach Gage — Sudoku that loves you

> AI-powered Sudoku game with advanced hints and learning tools. (iPhone/iPad app by Zach Gage.)

- Source: https://appshunter.io/ios/app/good-sudoku-by-zach-gage/id1489118195 (this page in markdown: same URL + `.md`)
- Developer: [Zach Gage](https://appshunter.io/developer/294263418)
- Category: Games, Entertainment, Puzzle, Strategy
- Price: Free with in-app purchases
- Rating: 4.20/5 from 1,322 App Store ratings · 491 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 189 MB
- Languages: American English
- Released: 2020-07-22
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/good-sudoku-by-zach-gage/id1489118195/reviews.md

## What is Good Sudoku by Zach Gage?

You’ve never played Sudoku like this.

Good Sudoku turns your iOS device into an AI powered Sudoku genius whose only mission is to help you learn and love this classic game.

Whether you’ve never tried Sudoku, or you play every day, Good Sudoku’s elegant layout, intelligent hint system, and busywork reducing tweaks will help you play better and have more fun.

- Over 70,000 of the highest quality puzzles you’ll see anywhere
- Optional tools to reduce busywork
- AI powered hint support to continuously boost your skills
- 3 standard modes: Good, Arcade, and Eternal
- 3 Daily puzzle modes that get harder throughout the week + global leaderboards
- 5 levels of difficulty
- Import your own puzzles from elsewhere in Custom mode (and share them with friends!)

---

We put everything we could into making the best digital Sudoku game ever released:

- We wrote a puzzle generator from scratch to create over 70,000 of the highest quality puzzles you’ll see anywhere. We spent weeks figuring out how to generate intricate and complex puzzles you won’t find in other Sudoku apps. Our hardest puzzles require wild techniques like “XYZ Wings”, “Hidden Quadrouples”, “Jellyfish”, and “Swordfish”.

- Most people don’t know this but Sudoku puzzles are actually generated by programatic Sudoku solvers. The fastest way to know how hard your puzzle is, or if it’s valid, is to write a solver that knows all the strategies that can try it. With Good Sudoku, we run our solver as you are playing, so if you get stuck, it can detect what you know by looking at your answers and your notes, and then help you find the next technique you need to solve the puzzle.

- Most Sudoku games classify difficulty into vague Easy, Medium, and Hard difficulties — But what do these difficulties mean? Typically they refer to the kinds of solving techniques that are required to solve a given puzzle without resorting to guess-and-check. In Good Sudoku we aren’t vague about it at all. We lay out exactly which techniques are required for each difficulty level. Good Sudoku allows you to practice them individually outside of puzzles, and keeps track of which ones you’ve learned!

- When we first got interested in Sudoku we noticed that a lot of players spend most of their time looking at the board and counting. On easy puzzles, this counting serves as a way to increase the difficulty by making the puzzle take longer. We know some sudoku players love the counting but we found it a bit tedious and designed some tools to alleviate the busywork. At first these tools might feel a bit like cheating, but once your mind is freed up from counting you’ll have space to see the much deeper more fascinating side of Sudoku: all of the beautiful technique structures. Freed from the burden of busywork Sudoku becomes one of the best search-style games we’ve ever played. More fun than word-searches and solitaire, high-level Sudoku is a real treat — and with Good Sudoku and a little practice, anyone can learn it!

- We noticed when looking at other Sudoku apps although there are often daily puzzle modes, those modes never include global leaderboards. Weird! Good Sudoku remedies this problem!

- We wanted to make the best Sudoku out there, and while we’re proud of our puzzles, we recognize that puzzles come from all places. That’s why we built a quick and easy custom puzzle mode into Good Sudoku, so if you have a paper puzzle that you’re stuck on, or you’re trying some wild variant (Like the Miracle Sudoku!) it’s easy to put it into the game, play it, and share it with your friends. If the puzzle follows standard Sudoku rules, our hint system will even help you get unstuck!

We truly hope Good Sudoku can introduce you to, or deepen your love for this great game.

-Zach and Jack

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Game Unlock | $4.99 | one-time |


## What do users think of Good Sudoku by Zach Gage?

Overall sentiment: positive

**Pros**

- 👍 Intuitive and clean interface
- 🚀 Efficient auto-note and highlighting features
- 💡 Helpful tutorials and techniques to improve Sudoku skills
- 🎨 Visually appealing design
- 🔥 Best Sudoku app available

**Cons**

- 🐛 Frequent crashes and freezes
- 🔋 High battery consumption
- 🤔 Confusing UI elements and navigation
- 📤 Lack of cross-device sync and progress saving
- 🙄 Intrusive ads that erase progress

**Commonly reported bugs**

- Daily classic mode scoring issues
- Game Center icon overlapping the puzzle board
- Inconsistent note-taking behavior
- Puzzles marked as unsolvable when they are solvable
- Progress not saving properly

**Most requested features**

- Ability to disable daily leaderboard and achievements
- Option to turn off auto-note and highlighting features
- Improved visibility of grid lines and notes
- Redo/undo functionality
- Dark mode option

## Recent user reviews (10 of 491)

All indexed reviews: https://appshunter.io/ios/app/good-sudoku-by-zach-gage/id1489118195/reviews.md

### 3/5 — Was great TIL YOU BROKE IT

*2026-08-22, version 1.0.30*

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.

### 1/5 — Internet required?

*2026-08-22, version 1.0.30*

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

### 3/5 — Excellent Sudoku App, but No Offline Mode

*2026-08-22, version 1.0.30*

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.

### 3/5 — Seems good if you already know Sudoku

*2026-08-21, version 1.0.30*

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.

### 2/5 — Buggy

*2026-08-19, version 1.0.30*

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.

### 4/5 — Loading screen frozen

*2026-08-17, version 1.0.30*

As many people have pointed out, the loading screen bug has no fix and is VERY annoying to deal with. I wouldn’t be so disgruntled if I could reinstall and have all of my stats and progress saved. Everything else about this app is great and I love it a lot, hence why I’m still using it regularly, but this bug is making me want to look for an alternative app.

### 2/5 — Disappointing

*2026-08-15, version 1.0.30*

I purchased this app because I grew tired of watching endless adverts on the “free” sudoku app I was using. Although I enjoy the functionality of this app it frequently fails to launch, which leaves me with no option but to delete and reinstall. Then I lose all of my progress and statistics. Not acceptable for a paid app.

### 2/5 — please see this

*2026-08-13, version 1.0.30*

after paying for premium i’ve been experiencing issues with the game such as leaving me waiting on a loading screen or not loading anything in general. I thought i finally found my fav sudoku app please don’t make me chance my mind !!

### 5/5 — The App the Taught me Sudoku

*2026-08-10, version 1.0.30*

I was never much for puzzle games but I always liked the allure of being able to solve sudoku puzzles.  After much time and specifically this app helping me learn to visualize the game better I'm now half decent!

### 1/5 — Gets stuck on ‘loading’, unplayable sadly

*2026-08-08, version 1.0.30*

I’ve loved this app for such a long time and hate using any other, and have paid for it multiple times. But it literally doesn’t work any more - it’s impossible to open any of the technique sections. I’ve reinstalled the app/restarted my phone countless times which fixes the issue for opening games, but even a whole fresh OS install (for other purposes lol) hasn’t worked for the techniques - I simply cannot open the 2 string kite section; it sticks on loading permanently. Extremely sad to see this app die.

## Frequently asked questions about Good Sudoku by Zach Gage

### 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.

## Version history (last 5 releases)

### 1.0.30 — 2025-07-21

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

### 1.0.22 — 2021-07-13

This update has various small bugfixes to the tutorials, sharing puzzles, and the numpad.

### 1.0.21 — 2021-07-02

Our fix for daily streaks went awry for some players — sorry about that!
To fix it we’re restoring everyones best streaks for all modes. Enjoy!

We’re continuing to work on streaks and hope in the coming months to have a more fun and forgiving daily system in all our games!

### 1.0.20 — 2021-06-24

Fixes for a crash on iOS 12 devices that our last version introduced.

### 1.0.19 — 2021-05-26

This version has some updates to our daily system, and a few other bugfixes. It also updates our ad system up to date with iOS 14.5's ad changes.

Because we default to no tracking, there will be no popup asking to track you across apps.

## Apps similar to Good Sudoku by Zach Gage

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## More apps by Zach Gage

- [Pocket Run Pool](https://appshunter.io/ios/app/pocket-run-pool/id949982914)
- [Sage Solitaire](https://appshunter.io/ios/app/sage-solitaire/id1004646445)
- [Typeshift](https://appshunter.io/ios/app/typeshift/id1084762137)
- [Really Bad Chess](https://appshunter.io/ios/app/really-bad-chess/id1109751921)
- [SpellTower Français](https://appshunter.io/ios/app/spelltower-francais/id1160360982)
- [SpellTower Nederlands](https://appshunter.io/ios/app/spelltower-nederlands/id1160360990)

All apps by Zach Gage: https://appshunter.io/developer/294263418

## Related topics

[good sudoku by zach gage](https://appshunter.io/ios/topics/good-sudoku-by-zach-gage) · [zach gage](https://appshunter.io/ios/topics/zach-gage) · [good sudoku](https://appshunter.io/ios/topics/good-sudoku) · [learn sudoku](https://appshunter.io/ios/topics/learn-sudoku) · [zach](https://appshunter.io/ios/topics/zach) · [gage](https://appshunter.io/ios/topics/gage)

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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 2026-08-27.*