SOS LED is much more than a handy flashlight: it's a useful app to help you deal with many everyday inconveniences or nuisances. SOS LED can emit SOS pulses of either light, sound or both. Discretely sends an email to designated recipients containing a pre-defined text and subject; optionally with your current GPS location and link to Google Maps. Calls a pre-defined phone number.
You can choose between three types of SOS pulses (slow, medium and fast), two pulses form (SOS or Train) and three modes of operation: maximize the number of pulses, maximize the battery life or an adaptive mode that monitors the battery level and adjusts pulses to the residual battery life.

Requires a device with a LED flash.

Disclaimer: Continued use of the flash may dramatically decrease battery life.