Over the past decade, smartphones have become one of the most important inventions. However, little emphasis has been put on composing mobile device services. In this research, we focus on the composition of different applications/services. A Mobile Device Lightweight BPEL Engine is presented in this, a composite service engine that can invoke and compose SOAP, RESTful services and Android Activity/Services. We extend WSDL documents to support mobile device services so that heterogeneous services can be orchestrated on the Engine.