The method involves regulating an evaluation module (C102) of an analyzing module (101), monitoring modules (M01-M03) or alert emission modules (102, 1021, 1022) by a user interface, before activating the modules. The analyzing and evaluation modules are activated. Alert variables (V01-V03) are regulated by the monitoring modules associated to utilization context of a portable device. The alert emitting modules are activated, when the evaluation module detects the state of emergency. An independent claim is also included for a portable device comprising an alerting device.