Seniors tend to self-track their health in various ways in their daily life. In fact self-tracking has become a habit of their daily lives and a way of living. Therefore, Quantified-Self offers a great match for this age group in particular. Towards this direction we have been developing a web application which visualizes sensor data gathered in real-life settings for over a six-months period. Technological details of the application developed are provided along with the type of visualized information. Further work is planned towards a user-friendly interface and the pilot testing of the application within the network of established living environments.