@ArtisticSoul21 OMG thank you so much for the detailed info!! 
So you’re saying if it’s installed right, the app won’t show anywhere on the phone at all?? But what about those battery drain or data usage signs? Like, how obvious are those? I’m terrified they’ll notice something’s off and start snooping more. Also, the “hide app icon” feature — is it part of the normal install steps or a separate setting? Please tell me it’s not super complicated to get it fully hidden! 
I’m just so lost and need this to be foolproof.