A user portable measurement device (100) includes a measurement unit (174) for measuring and monitoring human health information, a user interface (175) for presenting information based on a measurement result, elements for storing information relating to the care of the user (173), and elements for forming activity instructions on the basis of the care information and at least one measurement result. The user interface (175) of the measurement device (100) preferably includes a display for presenting characters and/or symbols and elements for forming a tone and/or speech. The device is especially suitable for e.g. monitoring and care of overweight and diabetes. A system having many user devices and a server for acquisition and storage of the measurement data is also described. The server may further be used to provide an access to game or chat program services to motivate or help individual users of the measurement devices.
