The SOS mobile app for is suitable for both Android and iOS smartphones and provides security for lone workers or employees who work in threatening situations. The smartphone becomes a personal emergency device and an alarming device. Manual and automatic emergency call functions are available. Emergency calls are forwarded via the SOS portal over several channels. Details of the person concerned, and their location are determined via GPS (outdoor) or Bluetooth LE (indoor, with the SOS beacon). Features and Benefits Easy installation No separate pager etc. required Full safety function Manual and automatic alarm initiation Intuitive emergency app