From what I've heard about camera APIs, making an app like this for Android would be much MUCH more than twice the work, and also probably would become 98% of your support tickets because X feature doesn't work on the Samsung Galaxy J5 Skyrocket Plus LTE when running a custom ROM from XDA Developers.
Someone from the company said in another thread it's already enough of a hassle dealing with all the possible camera configurations across different iPhone models, and iOS updates breaking things. I think there's a reason you don't see apps like this on Android.