I downloaded an app with my second apple ID from itunes and created an account using a phone number.
I noticed I can't use my Apple music since I'm considered signed in to the second apple ID, while I'm paying for music using my first apple ID.
If I sign into my first ID, can the app know that I am signed into that first apple ID?
I'm worried about privacy. don't want the app to connect me to the first appleID.