Abstract: A technology to support effective use of information collected by different lifestyle improvement support application is provided. An information processing system includes at least one processor, wherein the at least one processor acquires first information related to lifestyle collected through a first lifestyle improvement support application, and transfers the first information to second information, based on corresponding relationship between the acquired first information and the second information used in a second lifestyle improvement support application.

Abstract: A technology to support improvement in effectiveness of lifestyle improvement actions is provided. An information processing system includes at least one processor, wherein the at least one processor presents at least one high-priority action category based on information about lifestyle of a target user, and presents at least one action to be practiced by the target user in relation to the presented action category, based on difficulty level in making a habit by the target user.

Abstract: A technology to generate a question sentence to acquire a message whose expression is customized in accordance with at least one of information related to age, gender, race or ethnicity, and region of a user from a machine learning system is provided. An information processing system includes at least one processor, wherein the at least one processor accepts at least one of information related to age, gender, race or ethnicity, and region of a user who uses a lifestyle improvement support service, and generates a question sentence to instruct a machine learning model to make a change into an expression which is appropriate for a user layer identified by the accepted information, the machine learning model learning at least an expression that is in accordance with the information.

Abstract: A technology to support improvement in effectiveness of lifestyle improvement actions is provided. An information processing system includes at least one processor, wherein the at least one processor presents at least one high-priority action category based on information about lifestyle of a target user, and presents the target user with at least one action to be practiced by the target user in relation to the presented action category.