Abstract
Android is a Linux kernel based open source operating system developed by Google. Android primarily designed for smart phones and tablets with touch screen. We explored the Android Operating System and development of software environment and evaluated several of its capabilities by constructing a working application. This is an offline application which collects the speed of the bike/car through Bluetooth transceiver with help of digital speedometer of the bike to determine the location of nearby schools, and if a driver drove over the speed limit in school/college zone, it sounded an alarm to the driver. We believe android smart phones have broad applicability to public safety problems.