To provide a portable apparatus that realizes an excellent navigation function even by an apparatus single body without using a server or the like and to provide how to use the portable apparatus and a program thereof.

The portable apparatus is configured to comprise a position measurement means for measuring a position of a casing, a storage means for storing the position measured by the position measurement means as position information data; and a display means that displays a way from the current position measured by the position measurement means to the position denoted by the position information data stored in the storage means in terms of a distance and an azimuth. Further, the mobile apparatus further includes an azimuth measurement means for measuring a direction of the casing so as to allow the display means to display the azimuth corresponding to the direction of the casing measured by the azimuth measurement means.