Google Android is an operating system for advanced mobile phones and is great for playing go.
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Acego Early access 3 is an Android SGF viewer, you can view your own SGF files from your sd card or directly by clicking on a file in a browser
The app is available on the android marketplace for free.
Agora Go is designed for 2 players playing on the same device. All games are automatically saved with thumbnails for easy browsing. Paused games can be resumed later on. Finished games can be played back for review. Supports SGF file import and export as well.
AIGOView is an SGF editor/viewer written by Atsushi Iizuka, author of AIgo for Palm. Able to load and save files locally and via a network connection. Does not include a "play against computer" option.
BW-Go is an SGF recorder and viewer for Android phones & tablets, with all tools on a single screen. It has a read-only review tool with hint button so you can replay interesting games without fear of changing them. Also includes Kogo's Joseki Dictionary.
BW-Go is available through Google Play, in a paid and a free version. Now plays GNUGO as well.
ElyGo is a complete Android app. It includes :
- An SGF editor (which loads Kogo's Joseki Dictionary)
- Over 500 tsumego with answers as well as bad variations
- a Challenge mode where you have to solve a set of problems in a limited time (includes a monocolor mode)
- Play with a bot
- Import your own game database
- Play and observe games on IGS
The free GridMaster app contains a full featured SGF reader/editor, a lite version of Steenvreter, and a GTP interface to play other artificial opponents (such as GnuGo or Pachi). It can be used as a tool to play, study joseki, solve problems, make diagrams, annotate games, etc. The help provides an introduction to Go as well as some links to more information.
Hugoban is a go application for Android.
Solve go problems. Free. Find it at AndroidMarket?.
Magic Baduk Go-weiqi,igo is an app with life and death and tesuji problems.
Master of Go is a new Android program with 1,020 problems as of 16 May 2011. They are sorted into four categories, from easy to hard. The only problem is you have to scroll through all of the problems to get to a given level. That said, I found even the "easy" ones to be worthwhile for my level (1k). Once you get to a given level, it does give you the next problem automatically. User interface seems pretty good, and it does interact with you on most problems. The other nice feature is it has all sorts of problems, from life and death, to endgame, to connections, etc... Overall, it was well worth the 99 cents.
EDIT - Wow, the day after I posted this, the developer released a new update that fixes the level selection problem I mentioned! How cool is that? I love Android, you just don't get this kind of developer response from Apple, lol.
noGo is an open-source goban for game recording/viewing/editing , with features including the ability to open/edit multiple games simultaneously, option to replace/insert moves and rearrange the game tree, guess mode (with hints), and ~1000 preloaded pro games.
Tsumego Pro has a large collection of problems. They include all valid answers and a lot of bad variations, to help you know why you are wrong.
Comes with 100 free problems, other packages can be bought for a low price. It lets you try 10 problems before buying a package to get an idea of the kind of problems you will find inside.
Allows for playing games against AI (Author has ported GnuGo as an example, available for free on the market), studying games with an auto-play mode, practicing Tsumego, and studying Joseki. Doesn't come with any studying files, but supports most SGF, including Kogo's Joseki Dictionary. Has an ad-supported free version ("WeGoIgo Lite") and an ad-free paid version for $2.49, all available on the Google Play. Description on Google Play, and some information at the author's blog
Version 2.0 (currently only available in the paid version) supports reviewing games (editing comments and adding various annotations) and also includes a tool to download some SGF collections to get you started.
HughJfan: a very nice set of applications in my opinion. A series of 1,800 life and death problems, with good quality graphics. What makes it special is that you only get limited time to do each problem and get more points the quicker you complete them. The reason for the points system is that the app then synchronises with an online leader board so you can compete with other people to reach the number one position. There is a free version you can download to try it out. Also, the problems are divided into easy/medium/hard and you can either buy just one group at a time or all three in one go (saving 33 percent). There is also the option to take a test - which will assign you to a level. Beginner's level was easy for me (8-9k, KGS). Note: some of the screen shots in the Android Market show Korean language menus, but the Android Market version has been translated into English.
SiouxDenim The "(Lite)Yoo's Life&death" app requires the "directly call phone numbers" and "precise location (GPS and network-based)" permissions, which could be costly and allow one's privacy to be invaded. If one owns a rooted phone it is possible to revoke these permissions; the software happily works without them.
This piece of software allows you to play against GnuGo 3.8. According to the developer, its strength ranges from 8k to 12k.
The app is available on the android marketplace for free.
Check extended review
Go Free, Go (Aya)
Market links: Go Free,
10 different levels of strength, ranging from 30 to approximately 15 kyu. Free version supports 9x9, 13x13 boards, and 19x19 is limited to only first 60 moves - paid version removes this limitation.
Go Quest Online?is a client for android phones.You can start playing online immediately after download. - It's free. You can choose from 9x9 or 13x13 board. .The result is automatically decided by the server according to the Chinese rules. website for more information on play.google
Goigo is a commerical IGS client (costs £2.50). It has the best interface of all the Android clients. Check out a video review of the old version before the interface was redone Check videoreview
Hugoban is a go application for Android. http://www.androlib.com/android.application.com-hugohudson-hugoban-android-Exp.aspx
There is a KGS client for Android cellphones. See more on the KGS help pages. It costs $14.99, and you get two free months of KGS Plus when you buy it.
Play online on IGS server or review over 50,000 professional games from the SGF Database in one application only. The app is ad supported and was developed for Android OS 1.6 and higher. Unfortunately, the ads served from AdMob, are placed immediately below the game navigation buttons. As a result, it is very easy to touch the ad in place of the navigation button and be directed away from the game to the ad site. A marked flaw in an otherwise good application. Learn more on www.IQoid.com
Go Clock is a free clock for Android available on the Google Play Store.
Real Chess Clock is a free clock for Android.
I supports Japanese byoyomi and can warn you in the final 5 seconds of a period. The only problem is it lets you play with 0 periods remaining, so you have to set the period number to one smaller than the desired number of periods.
Never mind the name, I like "Chess Clock for Android" by Tomas Hubálek. I think it makes an excellent go timer. Configurable settings include Japanese byo-yomi (both variable number of periods and variable number of seconds). Several sound and vibration options, including 5 seconds warning sound. Fairly nice looks too. Mind to make a walk through the app to see all options (scroll). Minor drawbacks not to speak of as it is a free app (!). Facet: The settings are via the menu button and so the app cannot be used on a tablet and so it has received some negative comments.
ProGibo? Viewer by Wigomobile has several features, including a go clock. Korean (?) warning count down voice.