i don't have much to say, but i develop camera apps and i also started with Android and then moved to iOS. The transition was swift because of iOS's screen sizes/resolutions were well defined and straight forward, no fragmentation manager was required to handle different screens.

Although i was using a single device for Android, i couldn't help but write a generic manager to handle different screens rather than hardcode my prototype to a single device. On the other hand, iOS screen and camera previews are hardcoded by design, and that saved me a lot of time.

Android being open source helped quite a bit, since i could borrow all that code from the stock camera app, but it was tedious to say the least. When i transitioned to iOS i was surprised how fast i got my basic camera app to work (few hours perhaps).

There are other reasons why i find iOS to be superior for prototyping (i have only touched on the camera preview issue). One other example is the relative documentation. iOS documentation gets you going much faster when working with the camera at least.

Just my 2 cents.