Big fan of the Spotify app, because it keeps shoving pop-ups in my face about artists and shows I don't care about despite disabling these notifications in the settings. Points for discovery.

I also like how it constantly resets my "car mode" settings, so that my brain does a full reset every time I get behind the wheel.

Or how every week my "liked songs" is un-downloaded from my phone, so instead I get to binge a full season of British Bake-Off on the plane ride.

My favorite is the Terminator-esque widget/notification. I can swipe that sucker away, and force-close the app and it doesn't go anywhere.