I have a concept for an app that I think would be very popular. I have created the requirements and gotten quotes to have the app developed. Quotes are coming in from $6k to $15k. Some US based, some overseas. Before I spend the money on development and marketing, I'm curious about a few things. 1. How much does Android/Google take of the purchase price. If I were to sell it for $5, how much do I get and how much goes to Google. 2. This is relatively new business model, are developers selling apps doing well overall? Or, is it mainly techie people making apps as more of a hobby and glad to take a few extra bucks off of a few sales? 3. I've got about a half a dozen quotes with a wide variance in cost. Is there something I should be weary of? Are there common "gotchas" to Android app development I should be aware of? 4. Is ongoing support a small or big issue? I see all the time consumers commenting it doesn't work on my xyz phone. Is the fragmentation of the market a huge problem or overblown? I appreciate any feedback from folks with experience in this area. Thanks!!