The mobile application is kind of GPS tracking client. Once installed on user's mobile phone, it collects location information from the embedded or external GPS device and sends it to the web server. So, this application is mandatory part of free Open GPS Tracking system. It is written in Java and since it doesn’t have strong system requirements it can work on almost any mobile phone. Almost everything in application is configurable even though it will work with all default settings. The only thing that needs to be set is the device ID which user receives during free registration on Open GPS Tracking web site. Application will ask user to allow network, Bluetooth and GPS device usage. This is essential for application to work properly. Note that network usage will cause charges that depend on mobile operator. We cannot take any responsibility for any charges made using this application.