Use it to hang things like an adult
Eyeballing your wall hangings so they look level is fine if you're still living in a college dorm room, but your big-boy pad requires a little more care and attention. Thankfully, there's a built-in level on your phone. Just open the Compass app and swipe right.
See what planes are flying overhead
Siri's baked-in smarts will give you a digest of all the planes flying above anytime you ask, complete with airline and flight-number details, aircraft type, altitude, angle from your exact position, and even a "sky map."