Abstract: The invention relates to a detection device (10) for detecting the emotional state of a user. The detection device (10) comprises a processing unit (1) for processing data, in particular input data, a main data storage unit (2) for storing data, in particular input data and/or data processed by said processing unit and a connecting element (3a, 3b) for connecting the detection device (10) to an interface device (50), in particular a mobile phone or a tablet, and/or a recording device (7a, 7b). The detection device (10) is adapted to be calibrated to said user by use of the processing unit (1) and calibration data. In particular, the calibration data is at least one set, preferably five sets, of audio and video data of said user. The processing unit (1) is adapted to analyse input data based on said calibration. In particular, the processing unit (1) is adapted to compare input data to calibration data and to calculate the nearest approximation of the input data and the calibration data.