Abstract: A computer device in the form of a smart phone for acting as a meter comprises a sensor input for inputting data from a sensor, a store, and a data output. The computer device is arranged to act as a meter to provide measurements data from a sensor input at the sensor input over time. The store is arranged to store the measurements and to store measurement configuration data. The computer device is arranged to configure the measurements based on the configuration data to form configured data and to output the configured data from the data output. The computer device also comprises an information input for inputting information that affects the data from the sensor in the form of a camera. The computer device is arranged such that the measurements are associated with the information input at the camera.