Odour and/or gas identification system, comprising a portable electronic device comprising a chemical sensor being sensitive to different analytes and being adapted for supplying a measurement tuple (mt) comprising a set of tuple elements with each tuple element (mtx) of the set of tuple elements (mtx) providing a value measured during an odour and/or gas measurement by a dedicated cell of the chemical sensor and/or under a dedicated operating condition of the chemical sensor or of a cell of the chemical sensor; a database (76,4), wherein the database is arranged remote from the portable electronic device, containing a set of reference tuples (rt) with each reference tuple (rt) representing an odour and/or gas and comprising - a set of tuple elements with each tuple element (rtx) of the set of tuple elements (rtx) providing a value characteristic for being sensed by the dedicated cell of the chemical sensor and/or under the dedicated operating condition of the chemical sensor or of the cell of the chemical sensor in the presence of the odour and/or gas represented by the concerned reference tuple (rt), and - an identifier (id) for the odour and/or gas represented by the concerned reference tuple (rt); an evaluation unit (71,3) for comparing the measurement tuple (mt) to one or more reference tuples (rt) out of the set of reference tuples (rt) and subject to a result of the comparison returning one or more odour and/or gas identifiers (id) to the portable electronic device, wherein the portable electronic device is one of: a mobile phone, a handheld computer, an electronic reader, a tablet computer, a game controller, a pointing device, a photo or a video camera, a computer peripheral, wherein the evaluation unit is arranged remote from the portable electronic device, wherein the electronic portable device is adapted to send the measurement tuple (mt) to the evaluation unit, wherein the evaluation unit is adapted to receive the measurement tuple (mt) from the electronic device and is adapted to send the one or more odour and/or gas identifiers (id) to the portable electronic device, and wherein a wireless link is used for sending the measurement tuple (mt) and/or the one or more odour and/or gas identifiers (id). - a set of tuple elements with each tuple element (rtx) of the set of tuple elements (rtx) providing a value characteristic for being sensed by the dedicated cell of the chemical sensor and/or under the dedicated operating condition of the chemical sensor or of the cell of the chemical sensor in the presence of the odour and/or gas represented by the concerned reference tuple (rt), and - an identifier (id) for the odour and/or gas represented by the concerned reference tuple (rt); a mobile phone, a handheld computer, an electronic reader, a tablet computer, a game controller, a pointing device, a photo or a video camera, a computer peripheral, wherein the evaluation unit is arranged remote from the portable electronic device, wherein the electronic portable device is adapted to send the measurement tuple (mt) to the evaluation unit, wherein the evaluation unit is adapted to receive the measurement tuple (mt) from the electronic device and is adapted to send the one or more odour and/or gas identifiers (id) to the portable electronic device, and wherein a wireless link is used for sending the measurement tuple (mt) and/or the one or more odour and/or gas identifiers (id).