The application listens to sounds around the iPhone including snoring. When sound is heard, the iPhone and / or Apple Watch will let you know. In the case of a free app, the iPhone vibrates. If additional options are purchased, you can set the iPhone to turn on haptic, light, and audible alarms on the iPhone, and audible and haptic alarms on the Apple Watch. The total number of alarm signals of the watch in one day is limited to fifty. You can adjust the microphone sensitivity and alarm duration. If the iPhone works for a long time with the application turned on, it is recommended to connect the power supply.