According to their privacy policy, they are using both AdMob and Facebook trackers on their other apps, so that may happen to Raivo as well at some point.

I looked at their apps on the iOS AppStore. Some apps (including Raivo) don’t harvest any data. Some do to a minor extent - more than I prefer. Most haven’t been updated since Apple started requiring that info be posted - so who knows. Overall I’m getting through feeling this is bad for Raivo and its users, but I’m just naturally skeptical.