apple app store is by far, much higher quality and safer than android market.

due to open nature of android, security is weak and prone to virus & malware.
while a small number of ppl will complain against the lack of "customization" in iOS, but they forget that they can worry less abt stolen data and loss of money.

due to the high popularity and systematic approach of apple app store, many developers choose it to focus their creative talent and energy. therefore most great apps and games firstly came out for iOS before they are ported to other platforms. for example, angry birds.

android apps can only earn money effectively by in-game advertising.

furthermore, developers find it frustrating that many (not all) android users have no respect for intellectual property and prefer to use pirated stuff. the open nature of android also makes its apps easy to pirate.

so, it is natural that apple has the best selection of apps available.

for those who misunderstand, i am not anti-android. in fact, i have bought galaxy s, s2, sensation, evo 3d and optimus 3d before.