And can be trouble if you based it on some older webkit code (security!) the price is sadly one of contention. Apple pretty much killed the price of apps down to 99 cents or free. So the industry (or you) responded with ad supported apps.
http://www.businessinsider.com/how-much-do-app-developers-make-2015-5 tells me you want to keep your day job.
How can I estimate my own application? (It's a double browser - video on Youtube) The problem is: I'm not greedy but too low price can repel potential customers. Perhaps you know some forums or sites where I can apply?