Usage of smart phones has become more common nowadays. Timelog system is a user friendly and web based application which systemizes the business of a company with the focus on time tracking. Following the Timelog system from small screen of smart phones is not user-friendly because the Timelog application and its features have not been designed to be accessed from these devices. The solution is creating a smart phone client for the Timelog system which can connect to the database of the system. An appropriate approach is to design a Web Service as an intermediate layer to communicate between the client side and the database.The result is a smart phone client that can be used by users of Timelog system to manage their business when they use their mobiles instead of personal computers. The Web Service can also be used for other smart phone platforms. As a result it can be considered as a generic protocol for the mobile-user of Timelog system.