I'm an Android loving iPhone user

All that may be true, but it would still make a lot of business sense to make a version for the other 85% of phones out there, unless your app is specific to some hardware that makes the iPhone unique. Of which there’s very little. I have a hard time thinking of a non-hardware specific product that would only be useful to Volvo drivers. Cyan you imagine someone making an aftermarket dashcam that only worked on Volvos? You’d think they were a moron.