[kumarm]

Android Hands down. Yes Per User you make more money on iOS. But that market is way over matured and slim chance for any new entrant to make it.

Also there was a question in Silicon Valley iOS Developers Meetup mailing list to find Bootstrap developers who live on revenue from their apps (without any contracting work on the side). The only developers who seem to make money purely developing their apps are Android Developers. (Not a single iOS developer from silicon valley developer group with 6K+ members said they make a living purely on iOS app development).

PS: This was from September 2012. I don't know how to link the emails from meetup.

[coralreef]

Heh, surveys are only worth so much. Aggregate data is usually more useful.

FWIW make 100% of my income from iOS (<$100k range).