The choice between the two doesn't matter much, as others have pointed out. The part that does matter is which language is going to keep you engaged? Learning

The choice between the two doesn't matter much, as others have pointed out. The part that does matter is which language is going to keep you engaged? Learning another language/framework and how to use it means an investment of time, and whichever one will provide that interest/motivation to keep using it will be the one for you. You note that iOS may be easier to make sellable apps for, so that might be the better route for you.