Nextdns on ios and apple products

Hi, 

I have been using nextdns for long time and I am happy with it. 
i was using it as an app from apple store. But recently I went to the nextdns website and downloaded the nextdns profile. Because it says recommended. 
I just would like to ask if is there any difference between the app from the appstore and the downloaded profile ? 
I noticed my phone got more heat after downloading the profile. Correct me if I am wrong. 
looking to hear from you.