iOS or Android? Why not develop for both?
Turns out that nearly 1400+ of them are writing for both platforms, and Apple has four times the ten thousand developer community that Android has. What is significant here is that a lot of those cross-platform developers are behind some very popular apps. However, smaller companies are still finding it pretty hard to find the needed resources to port their apps to Android. Google asks for a $25 sign up fee from developers even for free apps, and paid content is available only in a few countries so far, which kind of explains the situation.
via Engadget
Things that are NOT allowed: