This list contains tsumego/tesuji apps checked and bought by myself (or by fellow go players). These apps are mostly for iOS devices, however if the app is also available on Android I will give such info too. Most of tsumego/tesuji apps available on the mobile market are currently iOS only, but hopefully for Android users it's changing and new apps are showing up also for a Google based OS. If you have info about new apps for iOS/Android I will update the list below.

The list will go with a name of the app, number of problems along with target/difficulty levels, price, link to AppStore, and my (or other's go players) short opinion of pros and cons of a particular app.

Newest additions are always at the top of the list.

I hope this list will be useful to you. Please remember this list is permanently 'WorkInProgress', so it will grow over time.

[previous update 30.XII.2013, 3 apps added, changes in some descriptions, corrections]
[last update 14.III.2014, SmartBaduk/Yoo Chung Hyuk info update for iOS 7 users)

Recently added apps are at the top of the list.
A legend:
DDK stands for double digit kyu (beginners), SDK - single digit kyu (intermediate), Dan is master level (advanced)

(23)
Name: Tsumego Pro (Go Problems)
Number of problems: 712 (178 beginner problems, 211 elementary, 50 easy, 145 intermediate, 128 advanced)
Range: DDK to Dan (?)
Price: Free
Link to AppStore - None
Link to GooglePlay https://play.google.com/store/apps/details?id=net.lrstudios.android.tsumego_workshop

My opinion:
Looks like it has very nice interface, but since I don't have android device I can't say anything more about this app.

(22)
Name: Go Game: Yose
Number of problems: 727
( 174 官子价值学习第一阶 /basic, 39 官子价值学习第二阶 /basic, 106 初级官 /easy, 309 中级官子 /intermediate, 99 高级官子 /advanced,)
Range: DDK to Dan level
Price: $4.99
Link to AppStore https://itunes.apple.com/app/go-game-yose/id673691591
Link to GooglePlay - None

My opinion:
Third app from developer of Go Game Tesuji and Go Game Life and Death (both mentioned below). Looks like quite good collection of end game problems. Every problem has description in Chinese but it's ok to ignore it - every time it's black's move and a goal is to play the best sequence.

(21)
Name: Go Puzzles
Number of problems: 300
Range: 100 DDK, 100 SDK and 100 Dan
Price: $1
Link to AppStore https://itunes.apple.com/us/app/go-puzzles/id690639727
Link to GooglePlay - None

My opinion:
It's an interesting app with kind of new user interface approach - very simple, but presentation is nice and clean. What make it different from other apps: you can't play any moves, you need to work out every problem in your mind. Correct and incorrect solutions are presented with no distinction which is which, just remember the first one is always a good one.

This is a compilation of problems available previously on GoGameGuru.com. I contacted developer of this app and he told me these problems are on a site with CC licence so according to him it was ok to use these problems. I wrote an email to David from GoGameGuru.com too for clarification if it's really ok.

(20)
Name: Cho U’s 4 by 4 Go Puzzles
Number of problems: 100
40 Beginner, 30 Easy, 20 Intermediate, 10 Hard.
Range: From complete beginners to high dan players (approximately)
Price: $2.99 /+ three additional sets of problems (50/50/100) for $1 each.
Link to AppStore http://itunes.apple.com/app/ri-ben-qi-yuan-zhang-xuno/id517153034

Boidhre's opinion: "Very nice. The Intermediate problems I've done are nice little ko problems with loads of traps in them, that move that looks really like a tesuji results in a ko six moves later and that kind of thing. Fun! (...) The initial app is expensive for what it is but I don't know of an alternative if you want a set of 4x4 problems on iOS and these would be ideal for solving solely in your head as John Fairbairn was talking about in another thread."(see here: http://www.lifein19x19.com/forum/viewtopic.php?f=15&t=8427)

(19)
Name: Go Problems
Number of problems: 4797
(228) taken from goproblems, Xuan Xuan Qijing (34), Guan Zi Pu (46), Problem sets 1-9 (4382), Igo Hatsuyo-Ron (11), Carpenter's square (14), GoSeigen (82)
Range: ddk to high dan
Price: Free / $35 via In App Purchases
Link to AppStore https://itunes.apple.com/app/go-problems/id635778548

My opinion:
The good : nice interface. And it's the end of good news. The bad: pricing. Every set cost you about $3. And you can't be sure if Problem Sets 1-9 (the root of this app) are any good. All additional sets (I'm not sure about Problem Sets 1-9) are available free on the internet, and it is rather hard to find any justification for the prices in this app.

(18)
Name: Life and Death of Go
Number of problems: 7329
How to calculate liberties? (44 - some theory of semeai with diagrams)
Classical life-and-death shapes (118), Entry Level (800), Primary Level (800) , Middle Level (752), Superior Level (753), Kensaku Segoe's (950), Lee Chang-Ho's (738), Secret Essences (264), Fly Dragon Diagram (1000), Moving Finger (136), Magic Chess (446), Fa Yang Lun (193), Maeda Nobuaki's (210), Kada Koji's (216)
Range: DDK to Dan levels
Price: Free / $4.99 via In App Purchase (this is not an universal app, purchase on ipad cannot be restored on iphone, however you can use iphone version of app on ipad)
Link to AppStore for iPad https://itunes.apple.com/pl/app/life-and-death-of-go-p/id629031949
Link to AppStore for iPhone https://itunes.apple.com/pl/app/life-and-death-of-go/id623698040

My opinion:
Very good app from developer of Tesuji of Go. Both apps share same interface, it's clear and useful - looks ok on a phone, but not well designed for an iPad. The only downside is that it does not mark solved problems and there is no thumbnail view in a list of problems, only numbers. But if you are serious about studying L&D or Tesuji then you probably do your own journal with all data what and where you have completed already.
There is very interesting section about counting liberties in semeai if each group has an eye. There is presented some theory about "level of eyes" and simple calculation method which can be used to speed up a process of counting liberties in semeai. This was quite new to me.
If you have "WeiqiDB" app you can find that these apps share some problems library. I can't verify all problems but Level1 in "WeiqiDB" certainly has the same sets as Entry Level in "Life and Death of Go". If you are to decide which app to choose I would recommend this one over "WeiqiDB" (which has really terrible user interface).
There are a huge number of problems to solve, interface is good and a price is low so I highly recommend it.

(17)
Name: Art of Go (Collection from Master Wu)
Number of problems:81
Range: kyu/dan level
Price: Free/In App Purchase $1
Link to AppStore https://itunes.apple.com/us/app/art-of-go/id579972595

My opinion:
You need to speak Chinese to get the most out of this app because it is almost an audiobook with limited interactive section. It is some classic set of problems but I can't read chinese to be sure what is it exactly - probably it's a collection of Go Seigen's problems (there is reference to Wu Qing Yuan in app description). The app is Chinese only and every tsumego has full voiceover with position playthrough, which means you will hear a Chinese lector telling and showing you step by step how to solve particular tsumego you looking at. Very uncommon way to present go problems. There are 60 problems for free, and next 21 to buy for $1. Worth checking even if you don't understand Chinese.

(16)
Name: Tesuji of Go
Number of problems: 5 333
Authors/sources:
Jin Jiang (267), Tom (366), Kensaku Segoe (188), Lee Chang-Ho (735), Japanese Go Association (2 636), Kudo Norio (101), Yoda Norimoto (202), Middle Level Tesuji (360), Fujisawa Shuko (228), Ishida Yoshio (250)
Range: kyu to dan
Price: Free/In App purchase $4.99
Link to AppStore for iPad https://itunes.apple.com/us/app/tesuji-of-go-p/id629122102
Link to AppStore for iPhone https://itunes.apple.com/pl/app/tesuji-of-go-game/id622584811

My opinion: Looks like another very good package of problems. Interface could be better, looks ok on a phone, but not well designed for iPad. Low price with a huge amount of problems to solve. Sold!

(15)
Name:Igowin Life
Number of problems:2000+
Range: from DDK to strong SDK
Price: $2.99
Link to AppStore https://itunes.apple.com/us/app/igowin-life/id352240198

My opinion: Not bad, but interface is limited, very simple, there even isn't any list of problems. There are L&D, tesuji and joseki problems, all mixed up. There is no way to choose special section or to look at specific problem once again. There are no problem "divisions" for ddk, sdk or dan. You solve a problem you get a harder one - that's all (you can also solve a hard sdk problem and then get a 30 kyu tsumego so it's a little random). 2000+ problems for $2.99 is a good deal, and even if you are KGS 2/1 dan you can be surprised sometimes.

(14)
Name:XGoo HD (iPad) and XGoo (iPhone)
Number of problems: many - there are added new tsumego each day -> infinite?
Range: kyu/dan
Price:$9.99
Link to AppStore for iPad https://itunes.apple.com/us/app/xgoo-hd/id508416256

My opinion: Very good app, worth it's price, but it is not an universal app so I can recommend you only iPad version which I have bought and use. It is very interesting app: there is huge online database of games (over 100 000! but not easy searchable, internet connection needed), huge number of go problems but also not searchable in any way (you can just scroll infinite list of them). There is fuseki pattern search engine, which gives you exact games. And there is ready made compendium for some specific fuseki which can be very good for study. You can have multiple games opened at once (as well as multiple tsumego) - very nice feature when you study specific situation.

(13)
Name: Magic Baduk Go //iOS + Android
Number of problems: 1450
300 Begining, 300 Intermediate, 300 Advanced, 250 Expert
300 Tesuji
Target range: DDK to dan level
Price: $2.99
Link to AppStore https://itunes.apple.com/us/app/magic-baduk-go/id411378862
Link to GooglePlay https://play.google.com/store/apps/details?id=com.bdapp.badukmosueng

My opinion:
Good value. Lot of problems to solve, low price. Simple, useful interface.

(12)
Name: Master of Go //iOS + Android
Number of problems: 1200
100 easy (DDK), 402 normal (SDK), 440 hard (strong SDK / low dan), 158 very hard (dan)
Target range: DDK to dan level.
Price: $1.99 /
Link to AppStore https://itunes.apple.com/app/master-of-go/id412842099
Link to GooglePlay https://play.google.com/store/apps/details?id=com.maryharry.masterofgo

My opinion:
Good value. Lot of problems, low price. Useful interface.

(11)
Name: Nihonkiin Tsumego Master
Number of problems: 485
25 before start tsumego, 25 intro (DDK),65 beginner (15k-10k), 60 intermediate (10-7k), 60 advanced (7k-4k), 55 shodan,
55 micro tsumego (Ohashi Hirofumi 5p),
55 simple tsumego (Rin Kanketsu 7p),
55 pearl tsumego ( Shinji Yamada 6p),
55 higher level tsumego (Toshimasa Adachi 2p)
Range: DDK to dan level
Price: Free / Additional sets of problems available via in-app purchases $3 for sets of tsumego composed by pro, $1 for each set from "beginner" to "shodan". Total cost of $16-25$ (may differ in some regions).
Link to AppStore https://itunes.apple.com/us/app/nihonkiin-tsumego-master/id483504917

My opinion:
Good interface, and there is always a free portion of problems for each level so you can try if they fit you. You can see a miniature of every problem set so you can decide by yourself is it worth to pay for, or even you can try to solve them from a locked view. Overall it's quite good app but an additional in-app purchases gives you entry only to a limited set of problems so it does not goes cheap at the end. It's partialy free so give it a try.


(10)
Name: HY’s Creative Life&Death Problem
Number of problems:393
50 (30-18kyu), 49(17k-15k), 35(14k-12k), 30 (11k-9k), 31 (8k-6k), 27(5k-3k), 27 (2k-1k), 25 (1-2dan), 23 (3d-4d), 24 (5d-6d), 32 (7 dan), 40 (Pro)
Range: beginner to pro
Price: Free
Link to AppStore https://itunes.apple.com/us/app/hys-creative-life-death-problem/id571906462

My opinion:
Good value. Problems for everybody. Interface is far from perfection, is not well designed but after a few minutes you will know how to use this app. Beware - a few problems are incorrect. It's free so give it a try.

(9)
Name: Smart Baduk Go - Full / Yoo Changhyuk Life & Death //iOS + Android
Number of problems: 1800
300 begining 1, 300 begining 2, 300 intermediate 1,300 intermediate 2, 300 advanced 1, 300 advanced 2
Range: beginner to 2-3 kyu EGF
Price: $5.99 - read comment below before you buy
Link to AppStore: https://itunes.apple.com/us/app/smart-baduk-go-full/id487100814
Link to GooglePlay: https://play.google.com/store/apps/details?id=sgdata.baduk&feature=search_result#?t=W251bGwsMSwyLDEsInNnZGF0YS5iYWR1ayJd

My opinion:
Good value. Interface is good. Few seki problems with opponent's last move are messed up (you can't complete them). Overall it's a good training tool.
Attention iPad users: due to some bug in the app it crashes on iPad. Lite version works but full is broken.
There is partial workaround for this crash: please change Region Settings in iPad's "Settings" App to Korean. "This doesn't change menu languages and similar, only date format, names for days of the week and so on." - thx Boidhre! App should work now. On iPad4 - works ok, but if you have iPad 1st gen then it's hard to say will it work or not (does not work in my case).
iOS 7 - app does not work properly. Don't buy this app until update with bug fixes.

(8)
Name: Go Grinder //iOS + Android
Number of problems: 497 but you can add there your own sets of problems
150 basic tsumego, 347 Xuan Xuan Qi Jing
Range: SDK and dan, and you can add to it whatever you have
Price:$2.99
Link to AppStore https://itunes.apple.com/us/app/gogrinder/id391100440
Link to GooglePlay https://play.google.com/store/apps/details?id=com.gogrinder

My opinion: It's ok, and if you have your own sets of problems you can add to it then it even more than ok.

(7)
Name: EasyGo
Number of problems: 2368, and you can easily add there your own sets of problems
752 of total basics, Tsumego: 443 Easy, 251 Medium, 199 Hard, 428 Tesuji, 295 Endgame
Range: beginner to dan levels
Price: $11.99
Link to AppStore https://itunes.apple.com/us/app/easygo/id492566615

My opinion: Very good value. Quite big database of tsumego and ability to add your own sets of problems. This app is also a very good tool for creating tsumego sets, it has good go game sgf editor with moves tree, and can show you raw sgf as txt - very useful. The app looks a bit pricey at first sight but is definitely worth it's price. Check out a free "lite" version. I use it for creating a tsumego collections I gather from different sources and I use this app mainly for teaching kids and as introduction for new players (built in problems are very well prepared for this ) and it's very good tool for this purposes. If you are new to 'go', want to teach someone, want to teach kids how to play or how to solve go problems then this app is definitely a very good choice.

(6)
Name: SmartGo Kifu
Number of problems: 2044 (goproblems.com?)
Range: DDK to high dan levels
Price: $19.99
Link to AppStore https://itunes.apple.com/US/app/smartgo-kifu/id364854741?

My opinion: Tsumego section is good, but it's not a main feature of this app, and it's not that good itself for premium price of this app. There are other features which are making this app the best one. It's great as a game recording tool and for reviewing games, there are also: pattern search/recognition (joseki & fuseki/joban search), huge database of pro games from GoGoD (over 73 000 of them) with biograms of pro go players, bookview option for game review, guess next move option, very good editing tools - almost in par to desktop go software, tree view. Interface is very good, zoom options are done as it should be. There is nothing comparable on other mobile platforms, and I call this app a killer feature of iOS and Apple devices. This app is worth it's price and is worth to buy an iPad itself just for this one app (along with SmartGo Books). I bought it 4 years ago (previously SmartGo Pro) and I'm still using it almost every day. My personal Best Mobile Go Software.

(5)
Name: WBaduk //iOS + Android
Number of problems: 2633
Range: DDK to dan level
Price: Free
Link to AppStore for iPad https://itunes.apple.com/us/app/wbaduk-hd/id449564884 & iPhone https://itunes.apple.com/us/app/wbaduk/id449564651
Link to GooglePlay https://play.google.com/store/apps/details?id=com.wbaduk

My opinion: Although it's a client for playing games there is a good tsumego section too. It's a free app so give it a try.
The app is not perfect, here is a link to the post made by lindentree about some bugs in Tsumego section:
viewtopic.php?t=8941

(4)
Name: Go Game Life and Death
Number of problems: over 7000
"Amateur" section: 50, 837, 106, 610, 442, 59
"Pro" section: 111 发阳论, 997 天龙图, 1688 官子谱, 462 官子谱 2, 246 玄玄棋经, 92 棋经众妙, 136 鬼手魔手, 300 职业集一, 80 职业集 2, 245 职业集 3
Range: DDK to high dan levels/pro?
Price:Free / In-app purchase
Link to AppStore https://itunes.apple.com/us/app/go-game-life-and-death/id528519530

My opinion: Interface is not the best one. Huge (7000!) database of tsumego. From DDK to high dan level. Worth to pay via in-app purchase. Descriptions of problems are all in Chinese, but it's not a dealbreaker and knowledge of chinese is not needed to solve any problem.

(3)
Name: Go Game Tesuji
Number of problems: 3508
Range: hard to say where it starts but probably SDK to dan level
Price: $7.99
Link to AppStore https://itunes.apple.com/us/app/go-game-tesuji/id562897263

My opinion: Good value but shares same interface as Go Game L&D so it is not a pretty app, especially on iPad where it looks like overstretched iphone app . It's not a cheap one but it has a huge number of problems. Descriptions are all in Chinese, but in most cases they are not important to understand what we have to do.

(2)
Name: WeiqiDB / 围棋题库
Number of problems: 6400
Range from weak kyu to dan level.
Price: Free / 4€ or 5$ for answers
Link to AppStore https://itunes.apple.com/us/app/wei-qi-ti-ku/id578451349

My opinion: It's a good deal. Even if interface of this app is a real pain (it is the worst interface I saw in the AppStore, really), there are thousands of tsumego to solve and it's free.

(1)
Name: WeiqiOk //iOS + Android
Number of problems: 12,563
Range: from beginner to high dan levels
2024 Simple (<9k), 1728 (7k-9k), 2127 (4k-6k), 2397 (1k-3k), 1745 (1d-2d), 1480 (3d-4d), 1062 (>4d)
Price: yearly subscription of $60
Link to AppStore https://itunes.apple.com/us/app/palm-weiqi-hd/id530802453
Link for Android http://www.weiqiok.com/asp/UserHandPudu.asp

My opinion: Too high price as for me. But you get a huge database of fuseki, tsumego, joseki, kifu, players, pattern search etc. It's basicaly a mobile client for weiqiOK.com site. Payment model is the only thing I dislike about this app/service, but if you can afford to spend so much money, well, it's your choice.

Name:
Number of problems:
Range:
Price:
Link to AppStore [url][/url]
Link to GooglePlay [url][/url]
My opinion:

_________________
Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

You should check out Yoo Changhyuk and Unbalance's tsumego

https://play.google.com/store/apps/deta ... 5iYWR1ayJd

https://play.google.com/store/apps/deta ... HVtZWdvIl0.

I like both of these. Yoo Changhyuk has a bit more.

I also extensively use GoGrinder with my own sgf.

Thanks Oren.

Yoo Changhyuk Life & Death on iOS is called Smart Baduk GO (was listed above already). I think they changed their name on iOS to be more searchable and to get some clients looking for SmartGo.

[update]
Second app is called 実戦詰碁 by Unbalance and is also available on iPad/iPhone - but it's not available worlwide, it's Japan only. The only thing I can say about it is a number of problems available in the app itself: 346.

OOoo!!!!

This is great! I already have the Nihonkiin Tsumego Master but I can look into some of the others. I have unlocked all the problems in that app and it took ~ 25$ US (YAY iTunes gift cards!) I find that overall I like the app very much. Anyone else play with any of these? Have ones you particularly like?

Well, I already listed my opinions and every important detail above
But looking only at the number of problems and a price of app here it is my top list:

Free:
WBaduk (2633 of tsumego)
HY’s Creative Life&Death Problem (393 of tsumego)
WeiqiDB or 围棋题库 (6400 of tsumego)

Paid:
Go Game Life and Death (over 7000 of tsumego)
Go Game Tesuji (over 3500 of tesuji)
WeiqiDB (or 围棋题库)

I have installed every app mentioned in my 1st post so if you want more details about any of it just ask, but in short: almost every app will be a good choice, look at the number of problems in the app and a price and you will know which app to choose.

_________________
Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

Thank you, Lobotommy, may you forever keep all your brains

This thread has been a valuable resource for me, and I especially like the fact that you also posted iTunes links.

Greetings, Tom

_________________
“The only difference between me and a madman is that I’m not mad.” — Salvador Dali ★ Play a slooooow correspondence game with me on OGS?

Add XGoo HD to your list. It is excellent app for watching League games live or from records but it is with Life and death section with new problems each day.

Another tsumego apps are from Kubisoft. They have even funny guess next move app trying to use gamelike behaviour as help/motivation for memorizing games.

Thanks Xyiana, I totally forgot about XGoo, it is very good app worth to be mentioned.

As for Kubisoft - they have a bunch of apps with almost same icons, with descriptions only in Japanese, so I previously even thought that this is some kind of scam. Good to know that this are real go apps.
I only checked their "Lite" apps. Interface in their apps indicate that these apps are designed rather for a very young audience. And even if kubisoft apps are good I can't verify what their apps are about before buying - descriptions of their apps are all in Japanese and screeshots are inconclusive. If you know Japanese/Chinese then ok, you will know what is what. I found that I can't recommend them to anyone to buy their full versions (including me, and I don't buy 'cat in the bag').
But If you can provide me closer data about these apps in a scheme I used above then I will include your informations into the list.
Thanks

_________________
Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

Great list for iphone users ! Just bought SmartGo Kifu after reading your reviews

I know only few basic symbols needed for tsumego solving so i cant translate Kubisoft apps for you. But they are rly easy to understand.
I have next 2
cai-wei-qi-ri-ben-gu-wei-qi is guess next move app. 50 different games. You need to finish them one by one like levels in game. There are hints where to play, you need to guess only crucial points and sequences/between them app is doing autoplay/and you get points for correct guessing including bonusses for more than 1 correct guess in a row. You can choose to play as white or black and if you get enough points till game end you can advance to another game. This app is something unique and i like it.

wei-qi-si-huo-ti is starndard tsumego app with over 1500 problems. I dont know how much over 1500 exactly, app is too slow with scrolling over problems. Problems selection is nice , separated to 3 parts with different difficulty from like 10kyu up.

I would like to suggest "Igowin Life" (2000+ problems for $2.99), at least for the sake of the completeness of the list.

EDIT: And thanks for making me aware of the WBaduk app. What amazing free tsumego collection!

Thanks Samura. Igowin Life added.



You're welcome.

_________________
Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

Wow! What a great list--detailed without being overwhelming--and a great time saver!!

I look forward to a similar effort on behalf of us Android users--I hope there is a "SmartGo Kifu" amongst the offerings!!

Thanks again!

I just discovered four new (at least to me) tesuji/tsumego apps.

More details as soon as I try them.

[Update 16.05.13]
Added Tesuji of Go description.
Added Art of Go description.

_________________
Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

I tried the Go Problems one there and uninstalled it after playing around with it for five minutes. I don't remember exactly why but for me to do that there must have been some serious issues with the app.

Go Game Life and Death I installed a few days ago. I disagree with you, the interface is terrible. The untranslated Chinese is grating in a paid app (free to download but 11 Euro to unlock the problems) but considering the translation mistakes that litter what they did translate it doesn't look like they gave a damn anyway. The problems are good and enjoyable but solving each one brings up a damn "pop up" asking if you want to talk about your successful solving on Sina or WeChat, two Chinese social media sites. Several of the buttons at the bottom do not work or crash the app when tapped, iPad 3 iOS 6.1.3 so really this should not be happening.

The problems are nice, the app is quite unpleasant to use. It's quite a poor port of a Chinese app. Little effort was made to localise the content. I wouldn't mind but the go community being what it is it would not be hard to find a native English speaker to proofread for serious errors and find testers for the apps free of charge. I really want to like this app, the problems as I say are of decent quality and worth paying for but the interface is really turning me off of it at the moment.

I use this app every day and have not seen any crash since day one. I use it on iphone4 (iOS 6.1.2 with JB) mostly. I checked how it works on ipad 1&4(iOS 5.1.1 & 6.1.2 with no JB) and had no problems.

Interface is not the best, true, but it's not such terrible to be a dealbreaker. It is just ugly - like overstretched iphone version. I saw much worse apps in terms of funcionality (WeiqiDB for example - THIS is a real horror to use, and even Hye Yeon's Life and death has worse interface, so it is all relative). Chinese descriptions are not important, if something is unclear then it is a good thing to work it out on your own (especially in higher level tsumego where you are sometimes left with a position not played out).

The problems are the essence of the app and the selection is good, which we both agree. Yes, popup is little annoying, I hated it at first but now just ignore, as you can tap anywhere to close it so not a big deal for me. But hey - there is over 7000 problems!



This app is a nice one till you open "problem sets" section and see $2-$3 for every next set. This is just ridiculous compared to some other apps with thousands of problems for free or 3-5 bucks. It is $40 for all sets which is a huge "No, Thank you" for me. I will try to give it a chance, though just to see how it works with a basic free set.

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Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

I guess we have different tolerances for UI standards. Not a big deal.

I tried Speed Baduk Go Life and Death last night, I rather liked it and the free version worked without an issue so I bought the full version of the app, which crashes after I log into their server. Specifically the top 20 list for the nation comes up and then the app crashes after hitting OK. This is rather annoying, I'll have to email the developer I think.

So looks like it works on iPhone4 (iOS 6.1.2), but crashed on iPads. Not good.
But wait a sec... I had an idea and it worked.

So here is a very annoying workaround for this crash: in settings app change language to Korean. App is working but... you know, everything is korean now and please remember which section in Setting is a language setting.

Now run the app, solve one problem. Close app - go to the setting, and choose english language.
Try the app. Should work now with no problem.

Info about this issue added to the description of app.

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Tsumego/Tesuji apps for iPad, iPhone & Android devices:http://www.lifein19x19.com/forum/viewtopic.php?f=18&t=7511

Thanks, I found the app works if Region Settings is changed to Korean. This doesn't change menu languages and similar, only date format, names for days of the week and so on.

Concerning :

Go Problems for iPhone 3GS, iPhone 4, iPhone 4S, iPhone ... - iTunes

https://itunes.apple.com/kn/app/go-prob ... 78548?mt=8

Developer : Adumbration Inc.

4500 problems apparently picked up at goproblems.com. 200 free problems, other sets in app purchase (is this legal ? the app has no help just a link towards goproblems.com ). No real website for Adumbration Inc.

Pretty nice interface. Solutions include some brief commentaries.