• Face detection:
  Face Detection is the most effective sensor and works by capturing video from the camera and looking for eyes, nose and mouth (all three are needed to make a face). If one or more faces are detected, sleep is prevented.
• Camera motion:
  Sleep is prevented if a moving target is captured by the camera (such as waving, walking or even slightly moving your head). A perfect combination for the default Face Detection as it works even when you are not directly facing the camera.
• Download monitor:
  Prevent sleep if there is network traffic. It works with all apps, on operations such as downloads and uploads, enjoying online videos and music and also receiving emails.
• Processor usage:
  Prevent sleep if any app is performing CPU intensive tasks, such as audio and video conversions, encodings, renderings, scientific calculations, image processing, etc.
• External display:
  Prevent sleep if an external display is plugged-in. A must-have for those who give presentations, speeches, demonstrations and/or trainings.
• Sound activity:
  Prevent sleep If ambient sound is detected. Useful when you’re talking near the computer such as in workshops and meetings where the camera may not be in a favorable position.

Description for Should I Sleep, Apple App Store

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