Should I Sleep icon

App Specs
File size:
2.67 MB
October 23, 2012
January 21, 2013

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Annoyed by the display getting dim when you're reading or watching something? Installed an app for that but always forget to activate it? By using a combination of heuristic sensors, such as FACE DETECTION, Should I Sleep checks if you are actually at the computer before it sleeps. Yes, the computer "sees and hears" you.

NOTE: To quickly see it in action, first disable the screen saver, quit any other sleep prevention app (such as Caffeine), open System Preferences > Energy Saver, set the display sleep to 1 minute and wait (don't touch the computer). On Mountain Lion a message will popup with the detection progress.


When the display is about to dim, Should I Sleep will start its sensors. Camera, microphone all other software processing will stay on for only about 3 seconds. After that, sleep will be allowed or prevented. No need to touch any button.


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.


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.


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. And it even lets you keep downloads with the display dimmed!


Prevent sleep if any app is performing CPU intensive tasks, such as audio and video conversions, encodings, renderings, scientific calculations, image processing, etc.


Prevent sleep if an external display is plugged-in. A must-have for those who give presentations, speeches, demonstrations and/or trainings.


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.


We have also added the old-style timed sleep prevention (caffeine mode). You just choose a predefined time period for the computer to be kept awake.


Having the display dimmed when we're focused on the computer is certainly annoying. Staying alert to "press any key" and prevent (or worse, fix) that, is disturbing and counterproductive. And that may happen during many activities, such as:

  • Carefully reading a web page, book or documentation
  • Listening to online music or watching online videos
  • Downloading or uploading files
  • Receiving an email with a big attachment
  • Following the progress of a software operation
  • Doing a presentation, training or demonstration
  • Converting, rendering audio, video and images
  • On a conversation, taking notes between intervals


  • Sleep prevention with unique heuristic sensors
  • Timer mode for display and screensaver prevention
  • Face detection - the most effective sensor - included
  • Additional sensors available as affordable in-app purchases
  • Blazing fast, 3-second, hardware-accelerated detection
  • Mountain Lion's notification center integration
  • Sensor sensitivity and accuracy fine-tuning
  • Modular development approach (more sensors on the way)

    Should I Sleep includes the Face Detection sensor and manual timer mode. Additional sensors can be purchased for an affordable price from within the application menu.


    Please, write to instead of submitting bugs or questions in an App Store review. We don't have access to reviewers email addresses and are not allowed to respond in that area. But we do answer each and every email!

  • What's New

    New in Version 1.7.7

  • Fixed: Detection loop if display sleep was set to "never"
  • Fixed: Remove extra sensors from media tests
  • Changed: Improved detection accuracy setting
  • Added: Keep external camera setting after reconnection
  • Added: Debug log for technical support diagnosis

    New in Version 1.7.6

  • Fixed: High CPU on eastern language systems
  • Fixed: Sensors catalog update after purchase
  • Fixed: Animations on non-standard retina resolutions

    New in Version 1.7.5

  • Added: Processor Usage sensor
  • Fixed: Shift-Ctrl-Eject and hot corner sleep
  • Fixed: Delay after closing lid
  • Fixed: Wake-up delay after long sleep
  • Fixed: Keep settings after update
  • Added: Restore purchases after update
  • Fixed: 10.7 occasional crash
  • Fixed: 10.7 button alignment and colors
  • Fixed: 10.7 notification menu
  • Added: Timer mode notifications
  • Changed: New preferences design
  • Changed: Preferences text review
  • Changed: Traffic threshold doubled
  • Changed: Removed icon white border
  • Added: Credits on About panel
  • Changed: Power management rewritten
  • Fixed: Notification on background downloads
  • Fixed: Intensive background detection


    Please, write to instead of submitting bugs or questions in an App Store review. We don't have access to reviewers email addresses and are not allowed to respond in that area. But we do answer each and every email!

  • Should I Sleep ( is a Mac software application that has been discovered and submitted by users of The latest version that our users have reported running on their systems is Should I Sleep 1.7.7. The most popular version of this application used by our users is Should I Sleep 1.8.0.

    Operating System: Mac

    Default Install Path: /Applications/Should I

    Minimum OS version: 10.7.3

    Copyright: Copyright (c) 2012 Marcelo Leite. All rights reserved.