In a way, yes. VOX saves the battery in the parent unit by turning off the screen and turning it on only when it detects a sound or even movement (if it has this function) and then turning the screen off again after some time. With the NannyCam R3 Smart VOX, it works by de facto turning off your phone screen with the app and notifications on your phone activated. When a sound or motion is detected while the screen is off, the phone screen will light up and display notifications on the screen. We also recommend that you have vibration turned on.