[kornish]

What do you mean? Ads show up as native content in Facebook, Instagram, etc.

[amelius]

Sorry, I was under the impression that the AppStore guidelines prohibit the use of ads.

[danaris]

Not even a little bit. There are vast numbers of free, ad-supported apps in the iOS App Store. This is accepted, intentional, and mostly fine (because it's nearly impossible for malicious in-app ads to either compromise your device, or exfiltrate data the app itself doesn't already have access to, due to iOS security & sandboxing).