Man can not live by Android alone. I wish it wasn't this way but a communication app that only serves Android is severely limited and won't make the cut on my Android phone.
Namely, things cannot operate easily as a background service. Forcing the user to jump though many hoops to make it work. And since it is not an apple service. There is a single button "reset settings" that breaks all the users changes for these apps.
On one hand it is generally more secure for iPhone users, on the other hand it greatly inhibits some types of innovation.