Great question. We’re often asked what makes the best phone tracking app, and while everyone’s needs are different, we keep coming back to the same three answers. Features. Features. Features. Mobile phone tracking apps come in all shapes and sizes, but only a handful are loaded with every feature you need. mSpy is one of them. We’ve made sure it works with the latest social media apps. And we’ve armed it with features that make it work with apps that aren’t even out yet.