[onion2k]

There could be non-shady reasons to do this.

I can't think of one.

[T-A]

https://www.waze.com/waze

[jccooper]

Perhaps you're unfamiliar with the multitude of excercise tracking apps? Tracking is entirely the point of those.

https://www.strava.com/ for example.

[Spivak]

Using FindMyiPhone/Android to have more data on what direction a missing person was heading instead of just location pings?

[frant-hartm]

Car insurance Air traffic control Simulations

[uryga]

maybe Pokemon Go?

[cbluth]

worldwide parcel shipping?

[volgar1x]

Uber?