In App Purchase or Pro (No ads) version?

Hello everyone,

I would like to know, from your experience which one is doing better: in-app-purchase or premium version of an app? (not game)

So far, in my case, premium versions of an app always was better than in-app-purchase. Recently, I added IAP to one of my apps and the performance is very low. I was thinking of removing that and adding pro version to play store. However, before that I wanted to know what other developers think.

Why not both versions?

1 - Ad supported
2 - Paid