A hearing device fitting device that includes a computing device (3), connected on an input side with a connection (E3) for data entry and on an output side with a connection (A3) for a hearing device. The hearing device fitting device further includes an audio storage medium play-back unit having a control input (E9) connected to a computing device (3) output and having an audio output (A3) connectable to a loud speaker unit (11) input. The device supports a method a method for fitting the hearing device in situ by applying the hearing device to an individual; subjecting the individual to an audio test signal; having the individual appraise said audio test signal; and automatically selecting, in dependency of said appraising, a subsequent audio test signal.