I have been playing through the tsumego shipped with SmartGo Kifu for the iPad but I want to ditch that and get a tsumego app for my android phone, instead. Which one is the best?

My phone is smaller than my iPad and, while the latter typically resides in my laptop bag in my office, car or at home, my phone goes with me and is on-hand more frequently. Also, SmartGo ships with problems from goproblems. Many of these are rather dodgy in quality - even to the extent of being blatantly broken.

I've been happy with GoGrinder.

GoGrinder is a great app, but you'll need to get problems from some source. I have problems from http://senseis.xmp.net/?GoElementaryTra ... velTesting that I put on.

Yoo Changhyuk also has an app that can be purchased for $5 I think that's fine.

Magic Baduk is the only one I'm happy with.

Try to look for Master of Go and Tsumego Master but I'm not sure if they are available / these are iOS apps, but maybe available on Android too.