YouTubers test out Ghost Radar, one of the most popular mobile apps for detecting "ghosts." WSJ's Andy Jordan samples the online amateur reviews.

PARIS - Police revealed Tuesday they had infiltrated and taken down an encrypted chat app called Ghost used by criminals ...

The app also features a few other goodies. For one, you can flip through a selection of Ghost photos and watch a few clips of the car as it oozes luxury all over the country side. There's even a ...