Analytics can and can't according to iOS ToS

Hey guys, as most of you i'm sure are aware, analytics in your games can really help our iterating your designs through play testing. I've recently become more interesting in the topic and started checking out what kind of plugins are out there, and some methods of rolling my own.
I came across Lumos, who seem very good and are simplistic yet thorough enough for what i need it for, plus it's free. Anyone used this before? Any recommendations?

Now...

Analytics can and can't according to iOS ToS