An iterative user-centered design method was used to develop and test mobile technology (the It''s LiFe! tool/monitor) embedded in primary care, followed by a three months feasibility study with 20 patients and three nurses. The tool consists of an accelerometer that transfers data to an app on a Smartphone, which is subsequently connected to a server. Physical activity levels are measured in minutes per day compared to pre-set activity goals, which are set by patients in dialogue with nurses. Nurses can monitor patients'' physical activity via a secured website. The counseling protocol is based on the Five A''s model and consists of a limited number of behavior change consultations intertwined with interaction with and responses from the t...