According to one aspect of the invention, there is provided a mobile apparatus including: a vibration sensor; an acquisition module configured to periodically acquire the number of vibration in a time period as a detected step count value; a first determination module configured to determine whether there is a possibility that the detected step count value is due to walking or running based on the detected step count value; and a calculation module configured to count the detected step count value as an interim step count. The first determination module determines the detected step count value is due to continuous walking or running of a user when the detected step count value satisfies a certain condition. The calculation module calculates total of the interim step count when the first determination module determines the detected step count value is due to the continuous walking or running.