Comparison

CrazyStone DeepLearning vs Piccolo

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

Piccolo

Experience the classic strategy board game with a powerful AI and a polished interface. Customize your game with beautiful themes, play online with friends or strangers, and enjoy a seamless experience across devices. Includes fun iMessage stickers.

Highlights
  • Strong, customizable AI engine
  • Polished native user interface
  • Variety of beautiful themes
  • Local and online multiplayer
  • Automatic game saves and move undo
  • iMessage stickers
Features
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• #1 Most Downloaded Game (April, May, June, July 2021) — Japan Mac App Store! • Featured in Apple's "What We're Playing", "Games We Love" and "Best Games Made in France"! • "Beautiful, minimalistic and highly addictive." — TouchArcade • "A simple but captivating game." — Mac4Ever • "From us, this small but fine application therefore receives an absolute recommendation." — Appgefahren • "Whether you're a fan of the game or not, Piccolo will make you love Othello." — MaxiApple Piccolo® is the best Othello app for iPhone®, iPad® and Mac®. It features a strong, fast AI on top of a polished user interface, with beautiful themes, advanced features, online play and more. Piccolo is available in 20 languages and comes with no ads or tracking. It's an Othello app made for Othello players by Othello lovers. • Strong AI: Piccolo features a custom Othello AI engine written in the Rust programming language, designed to be fast, challenging and customizable. The AI's default Level 1 difficulty can be beaten by beginners, while its Level 8 difficulty is likely to challenge even top Othello masters around the world. Designed from scratch, the Piccolo AI engine is sure to give seasoned Othello players a new type of opponent to play against, with often surprising and creative strategies. • User Experience: Piccolo features a native user experience designed for iOS and macOS. A modern design lets you focus on the game, with helpful move indicators, the ability to undo moves, and automatic game saves between every move in case you close the app by mistake or your phone's battery runs out. Multiplayer play is supported both locally and online. • Themes: Piccolo features a variety of beautiful themes to customize and breathe fresh life into your Othello experience. Othello veterans might enjoy sticking to the Classic theme, while others might prefer the handsome Seasoned Wood theme, the adorable Sailor Moon theme or even the Persian Spray theme, inspired by traditional Iranian ceramics. Additional themes designed by guest artist Aline Corrêa are also available, giving you access to an Othello game on top of an alligator lake, inside an ancient castle, next to Egyptian pyramids, and more! • Play Online: Piccolo Online is a free online service that lets you connect with friends via easily exchangeable Game Codes to play friendly Othello games wherever you are around the world. Piccolo Online also supports automatic matchmaking so that you can quickly play games with random opponents worldwide. Piccolo Online features quick, stable connections, and benefits from a strong privacy policy. • Cute iMessage Stickers: Send cute “chibi”-style iMessage stickers to your friends with Piccolo's bundled iMessage Sticker Pack! Featuring 36 custom illustrations drawn by anime artist Erica Li, the stickers feature Piccolo's adorable mascot in different relatable situations. • No Ads, No Tracking: Unlike a majority of games on the App Store today, Piccolo has no terms you need to accept before playing. Piccolo will never show you a single ad, and will never track you. The app is entirely a labor of love for the game of Othello, made by players for players. • Available in 20 Languages: Thanks to contributions from players around the world, Piccolo has been translated from English into Arabic, Chinese, Dutch, Finnish, French, German, Hebrew, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Spanish, Swedish, Thai, Turkish and Vietnamese. No matter where you are, Piccolo's interface will be easy to understand. Othello® is a registered trademark of MegaHouse Corporation. Piccolo: Othello is an independent implementation of the underlying game, which is placed in the public domain.

Screenshots

CrazyStone DeepLearning4 screens
Piccolo4 screens

Verdict

The call

The clearest difference is ads: Piccolo at none against CrazyStone DeepLearning's shown. Piccolo also leads on update cadence (every 4 days 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 Piccolo sells 2 one-off in-app purchases. 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 4.7 for Piccolo. Both are backed by a comparable volume of ratings — 1K and 603 respectively. Written reviews are what separate them: 72% of CrazyStone DeepLearning's written reviews are positive against 77% of Piccolo's.

UpkeepUpdate frequency

CrazyStone DeepLearning ships an update every 2 months, Piccolo every 4 days. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

Scorecard3 real differences · 7 level
CrazyStone DeepLearning versus Piccolo: the parameters behind the verdict, then further details
ParameterCrazyStone DeepLearningPiccolo
PriceFreeFree
Rating4.7 (1K ratings)4.7 (603 ratings)
Positive reviews71.5% of reviews76.6% of reviews — better
Number of ratings1K — better603
Update frequencyEvery 2 monthsEvery 4 days — 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 MB61 MB
Age rating4+4+
DeveloperUNBALANCE CorporationSymbolic Software

Customer experience

CrazyStone DeepLearning

All ratings1,012 ratings
Positive92.7%
Neutral2.8%
Negative4.5%
Written reviews130 reviews
Positive71.5%
Neutral6.9%
Negative21.5%

Piccolo

All ratings603 ratings
Positive92.2%
Neutral4.1%
Negative3.6%
Written reviews175 reviews
Positive76.6%
Neutral8.6%
Negative14.9%

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

Piccolo

From 603 App Store ratings

What we love

  • 👍 Addictive gameplay
  • 👍 Beautiful and simple UI
  • 🚀 Smooth and responsive
  • 🔒 No ads or in-app purchases
  • 👍 Challenging AI opponents

Room to improve

  • 🐛 Occasional bugs and glitches
  • 🔍 Difficulty balancing issues (too easy or too hard)
  • 🤔 Lack of online multiplayer
  • 🤔 No option to undo moves
  • 🤔 Unclear win/loss indication at the end of games

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

Piccolo

Reported bugs

4 issues
  • AI getting extra moves in certain situations
  • Settings button not functioning properly
  • Game freezing or crashing on some devices
  • Inconsistent piece size on different screen sizes

Requested features

5 requests
  • Add online multiplayer mode
  • Implement an undo move feature
  • Add a tutorial or tips section for new players
  • Introduce a 'watch AI vs AI' mode
  • Allow customization of game board and piece themes

In-app purchases

1 purchases

CrazyStone DeepLearning

Subscriptions1
  • CrazyStone DL Subscription$2.991 Month
2 purchases

Piccolo

One-time2
  • Theme Pack: Around the World$2.99
  • Theme Pack: Great Painters$2.99

Questions

Is CrazyStone DeepLearning free?
CrazyStone DeepLearning is free to download, with in-app purchases available.
Is Piccolo free?
Piccolo is free to download, with in-app purchases available.
Which has better reviews, CrazyStone DeepLearning or Piccolo?
CrazyStone DeepLearning and Piccolo are both rated 4.7 out of 5 on the App Store, from 1K and 603 ratings respectively.
Do CrazyStone DeepLearning or Piccolo have ads?
CrazyStone DeepLearning shows ads; Piccolo does not.
Which is updated more often, CrazyStone DeepLearning or Piccolo?
CrazyStone DeepLearning ships an update every 2 months, and Piccolo every 4 days. Most recently, CrazyStone DeepLearning was updated on September 23, 2026 and Piccolo on September 16, 2026.

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