En siren, kan det ge ett larm i kristider.
Du kan rapportera din aktuella position som helst för att få hjälp.
Support Apple Watch.
Av Apple Watch, kan även iPhone låsskärmen också slå larm.
8 functions more than the free version
* Supports flashing while issuing an alarm.
* Support flashlight function.
* Support flashlight brightness, flash adjustment.
* Support flashlight SOS function.
* Supports 15 kinds of alarm sounds, suitable for more scenes.
* Support when using the headset still use an external speaker to play the alarm sound.
* Support and other App play together, so that will not be other App interrupt alarm sound.
* Support for the Today Widget, the right slide screen can quickly start the alarm, which saves time.
Continued use of GPS running in the background can dramatically decrease battery life.