A friend of mine came up with an idea for an app, not really important what it is. But so he found someone to write it for him and I offered to help him monetize it. I've never done something like this before so I am looking for a bit of advice. I think for his app it makes sense to start off with a free ad-supported version. How do developers usually go about doing this? Apple and Google both have ways of doing it through their own means, but I'm having a hard to finding any good information on it from the perspective of putting an ad in your app, all I find is stuff about buying ad space. Could anyone help me out? Maybe tell me a bit about how to go about putting ads in the app and which one is better? Thanks.