The present invention relates to a system for estimating a stress condition of an individual, the system comprising a mobile device and a network unit, the mobile device being connected to the network unit and to one or more sensors, the mobile device comprising circuitry configured to: for each occasion of a plurality of occasions: measure a set of physiological parameters using the one or more sensors, and transmit first data relating to the set of physiological parameters to the network unit; and prompt the individual to input a perceived stress-level for the occasion via a user interface of the mobile device, and transmit second data relating to the perceived stress-level to the network unit.