Line Spy App – Track Line Messenger with mSpy: If your kid uses their smartphone to chat, you need a Line tracker app that lets you see their convos. This is the one. Line is a free phone calling and texting app that includes avatars, games, and other activities, making it a very attractive tool for online predators. With mSpy you can read all your kid`s Line messages and stay ahead of any possible danger. mSpy™ Cell Phone Tracker: Your #1 Monitoring Tool”: Keep your children safe both online and in the real world with mSpy™ parental tracking app. Monitor their GPS location, see who they are texting and talking to on Facebook or WhatsApp, what videos and images they share, and much more!