Optmize advertising categories

Hi I’m interested which categories give you most ecpm and that are best to choose when you want to advertise your app for example advertise game in games category app instead of bussines app.

I need this for TapForTap because there credits are spend by impressions and I dont want to waste them for show in apps that have useres that mostly are not interested in my category.

It is hard to find info about cross category promotions satistics.

Spend $50 at Admob and test this out… Also do A/B testing on your creatives. Cheap/useful if you have a few million impressions at TapforTap.