No I don’t believe iOS blocks all tracking by default. I had to go into settings and enable this.

This is what all the fuss is about - the latest patch makes the ATT opt-in, instead of opt-out. Since iOS 14.5, ~2 weeks ago, it's now opt-in.

I don’t think it’s like that for everyone, but I’m not sure what would determine where you are.

That's why "leave disabled".

But Facebook and other popular apps are nagging you to switch it on, so it's still an interesting statistic.

The switch allows the app merely to request tracking, so I'm surprised requesting that the user enable the switch doesn't violate the App Store guidelines (or maybe it does).

Pretty sure they are referring to the system level switch that blocks the prompt and auto-denies every app.

If I remember correctly it does.

I did switch it on, but only because I was interested to see which apps would try to request the permission.

I haven't seen this option presented to me. How would I make sure that app tracking is turned _off_?

Edit: Never mind. I found it under Settings/Privacy/Tracking: "Allow Apps to Request to Track". I might flip it on just to see what nags me about allowing tracking.