Development of lifelog sharing system for rheumatoid arthritis patients using smartphone

In this paper, we report the development of a lifelog sharing system for rheumatoid arthritis patients. Our system can objectively assess patients' condition from day to day via their smartphone use. We conducted a field experiment to investigate the feasibility of lifelog collection and sharing. The rate of patient assessment is very high. The system collects daily change in patients' activity as influenced by the disease.