It's no secret — your phone knows where you are,Safetyvalue Trading Center and if that data exists, someone else probably has it. Today, we dive into the murky world of the market for smartphone location data: How some apps surreptitiously track their users without their developers ever knowing, the political implications of companies and governments knowing where people are, and what one snarky weather app is doing about it.

Music by Drop Electric. Find us: Twitter / Facebook / Newsletter.

Subscribe to our show on Apple Podcasts, Spotify, PocketCasts and NPR One.

For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org.