The object of the present project is to promote the prevention of disability by providing 1) a feed-back and motivational coaching to the user, 2) relevant clinical parameters to the healthcare professionals in order to support the patient's follow-up, and 3) supporting the detection of preliminary signs of functional loss. The device consists of a smart, removable insole. It measures dynamic characteristics of gait (e.g., speed, variability, distance) as well as body weight modifications with minimal invasiveness. The insole transmits wireless the collected data to a storage server through a touchpad. Data will then be available for at distance consultations by users (i.e., patients or physicians). The investigators will conduct a wide range of evaluations of the device (technical, clinical, social, ergonomic, and economic), which will allow the optimization of the prototype. The evaluation of the prototypes will preliminary takes place at the Blagnac smart house. 10 healthy volunteers will test the device. The second evaluation phase will involve 60 frail community-dwelling subjects, with 30 of them which will use the smart insoles for 3 months. Comprehensive assessments will be conducted to highlight the feasibility, acceptability, interoperability, integration in healthcare network, and clinical relevance of the technological device in comparison to usual care.