We are Android only Shop (After wasting revenue's from Android apps on iOS and Windows).

This is what I suggest people who ask for Advise:

* If you want to raise money, Build an iPhone app.

* If you want to run a profitable business from early on, Build Android App.

Curiously there was an email thread in Silicon Valley iPhone group (http://www.meetup.com/sviphone/) a year back where someone asked if there are any developers who live on the money from the apps without any contracting work. Surprising the only people who said yes are Android developers.