Do not Disturb (DND informs you when your computer is being physically accessed without your consent or knowledge. You can trigger sleep mode by closing the laptop lid. Most physical access attacks require that the lid be opened. Digita's Do Not Disturb iOS app (DND IOS) allows you to receive physical access alerts on iPhone and respond in real-time. Do Not Disturb Companion must be downloaded from AppStore.
The DND macOS application is free to download. The DND iOS app can be downloaded for free and comes with a 7-day free trial that includes unlimited remote alerts, actions, and notifications.