FlightWatching is high tech software start up, awarded by the French Minister of Research in 2013 and member of ESA (European Space Agency) Business Incubator. FlightWatching developed a new technology that allows to build telemetry/monitoring applications using ad hoc graphical user interfaces for data visualisation solutions. Tracking and monitoring performance of aircraft can be done without any aircraft modification using standard equipment (using ACARS or LOGs). Our tools provide easy to use interfaces to uplink Acars messages to the aircraft and get more data live during flight.