Comparison

CrazyStone DeepLearning vs SmartGo One

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

CrazyStone DeepLearning

Play the game of Go against a powerful AI or other players worldwide. Test your skills with certification exams and track your progress in rating mode. Offers various board sizes and difficulty levels for all players.

Highlights
  • Online Go games against global players
  • IAGA Rating Certification Tests
  • 17 levels of play from 15k to 2d
  • Export/import SGF game files
  • Rating Mode with game history
  • Human vs Computer and Human vs Human modes
Features
Read full description

The strongest, the best Go app in the world based on Crazy Stone employing Deep Learning technology ! *New Features* -We have introduced an online game feature. Enjoy online games against players all over the world ! -IAGA Rating Certification Tests Challenge the Dan/Kyu tests provided by the International AI Go Association. -Premium Membership Completely ad free, higher levels and additional features for Premium Members. Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search. The highest level of Crazy Stone Deep Learning has achieved 5d in kgs rating and in this lite version, we have provided you the highest level of 2d for FREE! * 17 levels of play from 15k to 2d There are 17 levels of play (15k-2d) for all the board sizes. Crazy Stone has improved not only in strength, but also in his style of play and the lower levels are perfect for players who want to learn the game of Go. Now, the strongest level for Premium Members is 5d. * IAGA Rating Certification Test Challenge the Dan/Kyu tests provided by the International AI Go Association. You will be awarded certificate images if you pass the tests. (You will need to register an AI Game Account to challenge the tests. Registration is free)  * Export and import sgf game files You will be able to import and export game records in sgf format from other apps. Also you can copy game record data to the clipboard. * Rating Mode Test your skills with serious games against the AI, keeps track of the results of your games and the history of your rating! The Rating Mode will be partly unlocked if you reach 7k IAGA Rating. If you become a premium member, all of the Rating Mode features will be unlocked immediately. * Other features ・Friendly 3 input methods You can choose from 3 options of input methods (Zoom, Cursor & Touch). ・17 levels of play for each board size (9x9, 13x13, 19x19) ・Human vs Computer, Human vs Human (sharing a single device) ・Computer vs Computer Games ・Handicap games, variable options of Komi ・Hint (suggest) ・Instant Undo (available even when the computer is thinking) ・Automatic territory calculation ・Japanese/Chinese Rules ・Suspend/Re-start games ・Save/Load game record in sgf files ・Automatic and manual replay of a game record ・Highlight the last move ・COM resign feature ・Byoyomi games (You will not be able to select computer level in timed games) ・Atari warning ・Highlight the last move ・Play speed can be adjusted ■ Subscription Details The benefits of Premium Members are: -Completely ad free -Maximum AI playing strength will rise to 5dan -Play Rating Mode for all 3 board sizes -Challenge the IAGA Certification Tests higher than 7kyu About the subscription -Monthly Subscription for Premium Membership. -Customers will be charged a monthly fee to their iTunes Account. -The Subscription will be renewed automatically unless cancelled more than 24 hours before the end of it's current period. -Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. How to cancel the subscription -Form the app Touch the Manage Subscription button and then touch Cancel Subscription. -From your device Move to Settings > iTunes Store and App Store > Apple ID > Subscription -It is not possible to prorate usage fees, cancel or refund the subscription for the current period. -After cancelling the subscription, you will be able to play Engine Server Games until the current subscription period expires. Privacy Policy https://www.unbalance.co.jp/privacy/en/igominna/ Terms of Use https://www.unbalance.co.jp/eula/en/igominna/ * This app is certified by International AI Go Association

About

SmartGo One

Learn, play, and improve at the ancient game of Go. This app offers adjustable board sizes, a strong AI opponent, and tools to study professional games and solve Go problems. It's designed for players of all skill levels, from beginners to masters.

Highlights
  • Adjustable board sizes (9x9 to 19x19)
  • Strong KataGo game engine
  • Study professional game records
  • Solve Go problems and tutorials
  • Pattern matching for move suggestions
  • Territory estimator
  • Game recording and annotation
Features
Read full description

SmartGo One is the only Go app you’ll need, whether you’re just getting started or already a seasoned player. Learn, play, study, and improve with SmartGo One. Experience the ancient game of Go on your iPhone, iPad, or Mac in a whole new way. Also known as igo (囲碁), wéiqí (围棋), or baduk (바둑), Go begins with an empty board that gradually fills as players surround territory and capture stones. Start with a 9x9 board and move up to 13x13 and 19x19 as your skills grow. SmartGo One adapts to your strength, automatically adjusting handicaps so games remain competitive and enjoyable. And when you’re ready for a serious challenge, the powerful KataGo-based engine delivers strong, rewarding play. But SmartGo One is far more than a way to play Go. Read interactive Go books while replaying the moves they describe to deepen your understanding. Explore a collection of more than 138,000 professional game records spanning both modern and historical masters. Improve your reading and decision-making skills with a growing library of Go problems and tutorials. Want to know how a master would handle a position on your board? SmartGo’s pattern matching technology compares your game with historical pro games and shows how strong players approached similar situations. No matter your level, SmartGo One helps you continue improving. Features include: • 9x9, 11x11, 13x13, and 19x19 board sizes • Powerful KataGo-based engine • Fast and responsive gameplay • Manual or automatic handicap adjustment • Record, annotate, and edit your games • Territory estimator • Hints and move analysis • Undo and replay controls • Tutorial with over 100 problems • Extensive user manual We value your privacy and only collect the minimum information necessary to make our apps work well for you. Learn more at https://smartgo.com/privacy.html. This app is licensed under Apple’s standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CrazyStone DeepLearning4 screens
SmartGo One4 screens

Verdict

The call

The clearest difference is ads: SmartGo One at none against CrazyStone DeepLearning's shown. SmartGo One also leads on update cadence (every 2 weeks vs every 2 months). CrazyStone DeepLearning's advantage is iOS requirement (15.0 vs 26.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CrazyStone DeepLearning sells 1 in-app purchase, starting at $2.99 per month and SmartGo One sells 47 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for CrazyStone DeepLearning against 4.8 for SmartGo One. Both are backed by a comparable volume of ratings — 1K and 1.9K respectively. Written reviews are what separate them: 71% of CrazyStone DeepLearning's written reviews are positive against 77% of SmartGo One's.

UpkeepUpdate frequency

CrazyStone DeepLearning ships an update every 2 months, SmartGo One every 2 weeks. Both last shipped on October 2, 2026.

Scorecard3 real differences · 7 level
CrazyStone DeepLearning versus SmartGo One: the parameters behind the verdict, then further details
ParameterCrazyStone DeepLearningSmartGo One
PriceFreeFree
Rating4.7 (1K ratings)4.8 (1.9K ratings) — better
Positive reviews71.0% of reviews76.5% of reviews — better
Number of ratings1K1.9K — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better26.0
Further details — not scored
Size165 MB140 MB
Age rating4+4+
DeveloperUNBALANCE CorporationSmart Go, Inc.

Customer experience

CrazyStone DeepLearning

All ratings1,012 ratings
Positive92.7%
Neutral2.8%
Negative4.5%
Written reviews131 reviews
Positive71.0%
Neutral6.9%
Negative22.1%

SmartGo One

All ratings1,914 ratings
Positive95.6%
Neutral2.2%
Negative2.1%
Written reviews166 reviews
Positive76.5%
Neutral8.4%
Negative15.1%

User reviews

CrazyStone DeepLearning

From 1K App Store ratings

What we love

  • 👍 Great for learning Go
  • 🎮 Enjoyable gameplay
  • 💪 Strong AI opponent
  • 🎨 Good visual design

Room to improve

  • 🙄 Excessive ads
  • ⏱️ Extremely long ads
  • 🤖 AI difficulty too high for beginners
  • 🔒 Inability to close ads

SmartGo One

From 1.9K App Store ratings

What we love

  • 🚀 Awesome app
  • 👍 Great for playing and learning Go
  • 📚 Excellent integration with Go books
  • 🔍 Powerful analysis and review features
  • 💻 Seamless experience across devices

Room to improve

  • 🐛 Occasional crashes and stability issues
  • 🤔 Unintuitive user interface for beginners
  • 💰 Paywall for full 19x19 board and some features
  • 🤖 AI too strong for novice players

Bugs and requests

CrazyStone DeepLearning

Reported bugs

3 issues
  • Issues with input method and stone placement
  • Sound not working
  • Saved game state causing issues with ads

Requested features

5 requests
  • More advanced levels
  • Ability to replay and explore game variations
  • Option to slow down AI response
  • Landscape mode support
  • Analysis mode for premium users

SmartGo One

Reported bugs

3 issues
  • Illegal move detection issues on certain board positions
  • Problems with missing variations or incorrect answers
  • Inconsistent behavior when passing moves

Requested features

5 requests
  • Add read-only mode
  • Improve move suggestion explanations
  • Introduce difficulty settings for AI
  • Integrate online play functionality
  • Provide more randomness in AI moves

In-app purchases

1 purchases

CrazyStone DeepLearning

Subscriptions1
  • CrazyStone DL Subscription$2.991 Month
47 purchases

SmartGo One

Subscriptions2
  • SmartGo One Pro – Monthly$4.991 Month
  • Pro Games and Features14 Days trial$29.991 Year
One-time45
  • Just Enough Japanese 1Free
  • Key Concepts in Life and Death$2.99
  • Go Problems Master Collection$3.99
Show 42 more
  • Go Problems Add-on 2: Medium$3.99
  • Go Problems Add-on 1: Easy$3.99
  • Go Problems Add-on 3: Hard$3.99
  • Counting Liberties$4.99
  • The Monkey Jump$4.99
  • Double Digit Kyu Games$5.99
  • Go: A Complete Introduction$5.99
  • How Not to Play Go$5.99
  • Encyclopedia of Go Principles$5.99
  • Want to Play Go? Level 1$5.99
  • Black to Play 30-25 Kyu$5.99
  • The Workshop Lectures 1$5.99
  • Rethinking Opening Strategy$6.99
  • Learn to Play Go 1$7.99
  • Learn to Play Go 2$7.99
  • Learn to Play Go 3$7.99
  • Correct Joseki$7.99
  • “The Theory of Go”$7.99
  • Learn to Play Go 4$7.99
  • Buddhist Philosophy Game of Go$8.99
  • Graded Go Problems 1$9.99
  • Graded Go Problems 2$9.99
  • Want to Play Go? Level 2$9.99
  • Basic Techniques of Go$9.99
  • Graded Go Problems 3$9.99
  • Get Strong at Life and Death$9.99
  • Mastering Mini Go by Mark Tomlinson$11.99
  • Fuseki Revolution$11.99
  • Fundamental Principles of Go$11.99
  • The Basics of Life and Death$11.99
  • Joseki Revolution$11.99
  • Life and Death$11.99
  • A Survey of the Basic Tesujis$11.99
  • Tesuji$11.99
  • Tesuji for Beginners$14.99
  • AlphaGo to Zero, vol. 4$14.99
  • Trouble Master, volume 2$14.99
  • Trouble Master, volume 1$14.99
  • AlphaGo to Zero, Vol. 2$14.99
  • Invincible$24.99
  • Essential Go Proverbs$24.99
  • Pro – Lifetime Unlock$99.00

Questions

Is CrazyStone DeepLearning free?
CrazyStone DeepLearning is free to download, with in-app purchases available.
Is SmartGo One free?
SmartGo One is free to download, with in-app purchases available.
Which has better reviews, CrazyStone DeepLearning or SmartGo One?
SmartGo One is rated higher. CrazyStone DeepLearning averages 4.7 out of 5 from 1K ratings, while SmartGo One averages 4.8 from 1.9K ratings.
Do CrazyStone DeepLearning or SmartGo One have ads?
CrazyStone DeepLearning shows ads; SmartGo One does not.
Which is updated more often, CrazyStone DeepLearning or SmartGo One?
CrazyStone DeepLearning ships an update every 2 months, and SmartGo One every 2 weeks. Most recently, CrazyStone DeepLearning was updated on October 2, 2026 and SmartGo One on October 2, 2026.

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