Can we change the build settings anytime ?

I’m working on my Andriod game but don’t have any Andriod phone, so can I change the build settings to ios to test the scenes in my iphone (Unity remote 5), will it change anything or create any problem in the game?
I was worried that it may cause some problem or something like that so didn’t do that, please share your feedback.
Thanks.

You should be fine. If you want to flip it back to Android there should be no consequence.