Comparison

CrazyStone DeepLearning vs KifuBox

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

KifuBox

Manage and review your reversi game transcripts with this specialized app. Input games from various sources, add comments, and analyze your play with detailed statistics and opening management tools. Organize your games into folders and share screenshots for social media.

Highlights
  • Input and edit reversi game transcripts
  • Import from various sources (apps, camera, clipboard, CSV)
  • Analyze games with scores, graphs, and statistics
  • Manage openings with memorization tests
  • Organize transcripts with folders and search
  • Share game screenshots
Features
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KifuBox is an app specialized for managing and reviewing reversi games. You can easily input transcripts and game information, and review games. [Main features] Input transcript - Edit board to input misflipping games - Comments for future review - Import from Othello Quest - Import from eOthello - Import from clipboard to import transcripts of other game apps - Import from camera/photo to import real board - Import from AR camera to import transcripts from real board - Batch import from CSV file - Quick analysis to study easily without saving transcripts automatically - Set transcript sheet image to board background to input transcript easily - Launch quick analysis by link (URL) or iOS shortcut Show score and graph - Custom book - Show book info - Add positions to book - Benchmark score calculation - Show endgame loss/moves - Show "Umigame" number Show/edit game information - Input assist for tournament information and player name Review transcript - Save branch moves - Share screenshot for SNS Folder - To sort games by online/offline etc. - Search transcripts by player name, tournament name, date, comment, openings, designated position, opponent's rank, endgame loss and so on. - Save search conditions as bookmark. - Backup/restore folders. Show statistics - Stats for position and each cell - Stats of win-loss, endgame-loss and various detail items for folder and search result Opening management - Input openings - Show opening name on the board - Memorization test of openings - Filter openings [In-App purchase] KifuBox is available for free, but free edition has the following restrictions; - You can create up to 10 transcripts and openings in each folder - You can create up to 2 transcript folders including default folder - You can create up to 2 opening folders not including default folder. - You cannot create subfolders of opening folders. - Scores are not shown after move #40 in quick analysis - You cannot use batch import of transcripts. - Displays "Free edition" caption in transcript list, quick analysis and in AR camera screen. - You cannot use backup/restore within the app. Purchasing unlimited edition, these resitrictions are canceled. (Be care that quality of AR recognition is the same between both editions.) [Note] You cannot play game with KifuBox. Play games with other apps, and import transcript into KifuBox! [Acknowledgement] KifuBox uses modified version of Edax4.4 by Richard Delorme, GPL v3 software. Modified source code is available in https://github.com/lavox/edax-reversi/releases/tag/libEdax4i-1.7. The author agreed to use the software in this manner. Kifubox uses icons by icons8(https://icons8.jp).

Screenshots

CrazyStone DeepLearning4 screens
KifuBox4 screens

Verdict

The call

The clearest difference is ads: KifuBox at none against CrazyStone DeepLearning's shown. KifuBox also leads on review sentiment (100% vs 71%) and rating (5.0 vs 4.7). CrazyStone DeepLearning's advantage is ratings volume (1K vs 7). On price, update cadence, in-app purchases and monetization model 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 KifuBox sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

KifuBox holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CrazyStone DeepLearning has 1K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 71% of CrazyStone DeepLearning's written reviews are positive against 100% of KifuBox's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 5 level
CrazyStone DeepLearning versus KifuBox: the parameters behind the verdict, then further details
ParameterCrazyStone DeepLearningKifuBox
PriceFreeFree
Rating4.7 (1K ratings)5.0 (7 ratings) — better
Positive reviews71.0% of reviews100.0% of reviews — better
Number of ratings1K — better7
Update frequencyEvery 2 monthsEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size165 MB40 MB
Age rating4+4+
DeveloperUNBALANCE CorporationAtsushi Tanaka

Customer experience

CrazyStone DeepLearning

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

KifuBox

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews18 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

KifuBox

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

CrazyStone DeepLearning

Subscriptions1
  • CrazyStone DL Subscription$2.991 Month
1 purchases

KifuBox

One-time1
  • Unlimited edition$2.99

Questions

Is CrazyStone DeepLearning free?
CrazyStone DeepLearning is free to download, with in-app purchases available.
Is KifuBox free?
KifuBox is free to download, with in-app purchases available.
Which has better reviews, CrazyStone DeepLearning or KifuBox?
KifuBox is rated higher. CrazyStone DeepLearning averages 4.7 out of 5 from 1K ratings, while KifuBox averages 5.0 from 7 ratings.
Do CrazyStone DeepLearning or KifuBox have ads?
CrazyStone DeepLearning shows ads; KifuBox does not.
Which is updated more often, CrazyStone DeepLearning or KifuBox?
CrazyStone DeepLearning ships an update every 2 months, and KifuBox every 2 months. Most recently, CrazyStone DeepLearning was updated on October 14, 2026 and KifuBox on October 8, 2026.

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