Use SD on the ipad 2 and have it installed on the galaxy s4 as a backup. very slow and hard to see on the phone, however there for an emergency, equally so is 121.500.
Android version is slowly catching up and the new ipad version released in the last couple of days now has support for powerflarm collision avoidance stuff which looks awsome.
Generally find android devices a bit rough round the edges, simple things like the smoothness of scroll just isnt there compared to the apple equivalent.
Brilliant software.
Dan