Energy efficiency in wireless and cellular networks has become one of the most important concerns for both academia and industry due to battery dependence of mobile devices. In this context, PowerProfiler supports a real-time network power consumption profiler and an energy-aware network/interface selection tool for Android-based smartphones. PowerProfiler basically reports power consumption levels of network interfaces (Wi-Fi and Cellular) by making use of real packet measurements and realistic computations, and then lets devices handover horizontally/vertically to improve energy efficiency.