How to estimate potential income of using AdMob in the app? [closed]
It's quite impossible as far as I know to really estimate things like this. Your payment rate in Admob depends on a lot of things like fillrate and click-rate, but in general you can be sure it will be pretty low. Basically you're talking about figures as low as 0.04 dollar per 1000 views.
However, the real question is if your features/app are worth paying for, especially assuming that your app and developer account aren't well known and you're not picked out by Google into the spotlight of the first page.
Basically this is all up to your own judgement, but as I see it the choice to make when looking for max income, would be to do both.
If you look at most games (Take per example Angry Birds, Ruzzle, Wordfeud, DrawSomething etc) they launch both options: 1 with ads so people can try your app out, and 1 paid version for the -much smaller - group of people that are willing to pay.
The same ofcourse can be used with in-app payment features, by simply adding a feature to discard the banners when bought.