A nice one would be:
There are xx contact(s) with whom you didn't keep in touch in the last 6 months. They will be permanently deleted from your list.
Another one:
We found 3 free apps that you dind't use in the last 6 months. They were automatically upgraded to their payed subscription-based version (see your phone bill for details). This way you will surely check on them at least once a month..
My phone today:
Weather is nice, you don't have upcoming meetings, your productivity looks terribly low. Go out for a walking!
Ok, stop joking. I share your concern on "devices" spying on us, tracking our actions, profiling us..