This document describes how to use 1TopSpy cell phone tracking software to track Line messages on other phones. 1TopSpy claims to be powerful spyware that allows tracking of GPS location, text messages, call logs, social media messages, and more on target phones. It says installing 1TopSpy on the target phone and logging into the online control panel allows tracking and monitoring of Line messages along with other data from the phone. Customer testimonials praise 1TopSpy for allowing parents to monitor children's safety and businesses to track employee productivity.