The strongest, the best Go app in the world based on Crazy Stone employing Deep Learning technology !

Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search.
The highest level of CrazyStone DeepLearning has achieved 5d in kgs rating !

We have provided an Analysis mode to review your games, and Rating mode to confirm your
progress. In CrazyStone DeepLearning, there are all the features you need to enjoy and improve
your game of Go !

* 20 levels of play from 15k to 5d
There are 20 levels of play (15k-5d) 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 average players.

* Analysis Mode
You can analyze your current game and also game records saved in sgf files.
Use the analysis mode to review games and help improve your strength.
Move list, Histogram, Record analysis, Situation graph can be confirmed
with the analysis by Crazy Stone.

* Rating Mode
We have provided a Rating Mode.
You can confirm the results of games played and the history of your rating.

* Export and import sgf game files
You will be able to import and load game records in sgf format.
Please use CrazyStone DeepLearning to review and analyze Go games.
If you save games in DL format, the results of the record analysis will also be saved in the file.

* Other features

・Friendly 3 input methods
You can choose from 3 options of input methods (Zoom, Cursor & Touch).

・20 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

・Landscape mode

What's New

Version 1.1.2

Changed App Name to 'CrazyStone DeepLearning Pro'

Ratings and Reviews

4.1 out of 5

9 Ratings

9 Ratings

About import/export ...


I hesitated buying this for quite a while because of the negative reviews, especially regarding the SGF import/export capability. But I finally took a chance and am happy to say that they have fixed all of those issues. You can copy and paste to/from the clipboard to exchange games with other apps, export via email, load/save from iCloud and Dropbox (and probably other cloud drive apps, those are the only ones I tested), and it also works as an “Open with ...” target for other things like email attachments and web links.

I’d recommend trying the free version of CrazyStone first and seeing if it works for you because the import/export features are the same there. The Pro version adds Analysis mode and Rating mode (which tracks your rating separately for 9x9, 13x13 and 19x19) and removes the ads found in the free version. As others have noted, the UI isn’t the greatest in the world, but it is functional when you get used to it.

Even though it is quite expensive, I’m happy with the purchase, and it is at least much more affordable than the Steam version.



This app is wonderful for my level.

The real info


When I clicked on 5d and no time limit, it only thought to 10 secs at maximum, and it wasn't 5d strength, there's options to give crazystone more time to think them being 10 secs, 20 secs, 30 secs and 60 secs.... I played regular crazy stone 5d ( 10 secs per move ) vs crazystone at 60 secs per move and the one with 60 secs of thinking time lost! I thought maybe the longer thinking time is just good against far as I can tell 10 per move isn't even of dan strength and 20 secs per move is 1d maybe 2d what's also strange is that it doesn't even think for the complete time limit it always leaves an extra 3 secs for no it worth the 17 bucks yes if your looking to play a 2-3d level app, I have to do more testing, also I need to know if it uses the hardware from my iPad or if it's just a built in powerhouse.....idk so many questions need an answer.....not sure why this app doesn't go all the way to 7d....honestly though, wish you guys just gave an engine server option, but for free cause if 10'secs per move can beat 60 secs per movie I don't know who you expect would buy this if it's strength isn't even 4d nevermind 5d....maybe the time settings are just better against humans, maybe 30 secs per move is good in standard games, but why must I need to test these apps/engines on everyone to figure out its true strength?....I've tested enough now, 30 secs per movie it's a strong 3D, and that's the max it will be this app isn't 5d like it says.


Unbalance Corporation
50.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© UNBALANCE Corporation / Rémi Coulom SAS


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like