I'm upgrading from an ancient Tungsten T2 Palm to an HTC phone, but I'm disappointed to find that most of my Palm apps are still superior to Android's, which seem to be released only half (or less) featured. Google Sky is far more basic than the Palm Planetarium...although it's nice to have the GPS map the stars & other objects, there's very few labelled, there's no additional information on the object and the feature set is very slim. Not satisfying for amateur astronomers. The iPhone apps however look awesome: Starmap with stars up to 12th magnitude, at least 3 competing apps with sun & planet rise & set times, sky reports so you know what's up (including transient events such as meteor showers and comets), moon phases, view the past of future sky....not having this is a big gap in the Android app library, I hope someone fills it soon!