Statistics demonstrate that Android is the mostly used operating system on mobile phones and tablets across the world. These mobile devices operate using batteries which have limited size and capacity. Therefore, energy management when running mobile applications become of vital importance. In this paper, an energy-efficient android application for goods delivery management system has been developed. The major aim of this application was to monitor and minimise the energy consumption while running the application. Two applications have been built: a normal prototype and an energy-optimised prototype. Seven best practices have been identified and analysis has been performed on energy consumption by both applications developed for four different scenarios over a period of 60 minutes.  Results demonstrate that the energy-optimised prototype consumes less energy. For every hour, 597.6 J of energy and 8% of the battery level can be saved with the proper application development and energy optimisation techniques. Keywords: Energy consumption, Mobile phones, Android application, Best practices.