yes it is a generic question, because it meant to be generic.
I know it depends of the business of the App proposal but, in a macro vision way, what should be the common steps to monetize one developed Free app that has been downloaded over 200,000 times?
thanks
The only way that I am aware of is in-app purchasing. This is similar to the old 80's or 90's business model of releasing Demo versions that work but don't expose all of the possible functionality.
So there's two ways to go:
1) Release a free and a non-free version of the app. Some users will like the free version and buy the paid one.
2) Release only a free version of the app, but use in-app purchases to unlock features.
Either way you will want to spam them about the paid upgrades once in a while.