A biosensor interface apparatus (10) that utilizes pre-existing or standard electrical connectors (28) of mobile devices such as smart phones mobile media players and tablets (12). The interface device (10) transforms the input biosensor signals to compatible electrical signals for input to one or more of the mobile"s connectors (28). That signals are then conducted via one or more input conductors (26) in the connectors (28) to the mobile"s microprocessor (74) which may display or transmit the biosensor signals and derive further measurements from them.
