The aim of this bachelor thesis is usage of medical device in telemedicine and development application on Android platform. In the first part are explained the basic informations about eHealth, telemedicine and chronic disease diabetes. In addition thesis mentions also impact of physical activity on the health of the patient diagnosed with diabetes mellitus. For this purpose I received pedometer from my supervisor which was used for daily recording of physical activity. Data from this pedometer are sent to the iHealth cloud and from there they can be obtained via OAuth 2.0 authentication to my mobile device with Android operating system. In the implementation section, based on the received data a SQLite database structure was created. Next section of bachelor is devoted to display measurement values to chart with usage of AChartEngine. Final section explores the user interface of developed Android application.