Should I Sleep

Developer: Marcelo Leite

Current Version: 1.8.4

Last Updated: 4 years ago

Download Size: 3.7 MB - Download


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 10.8 and above you will see a notification message.


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 a Prevent by Time (caffeine) mode. You just choose a predefined time period for the computer and/or the display to be awake. Time periods and menu items are customizable.


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
- Try before you buy for additional sensors
- Blazing fast, 3-second, hardware-accelerated detection
- OS X 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 customizable Prevent by Time (caffeine) mode. Additional sensors can be purchased for an affordable price from within the application menu.


Please, write to [email protected] instead of submitting bugs or questions in an App Store review. We are not allowed to answer reviews and do not have access to user's email addresses. But we do answer each and every email!


Release Notes:


- Fixed: app corruption/redownload message


- Fixed: occasional crash on 10.9


- Added: Mavericks compatibility
- Fixed: Camera tests not working
- Changed: Minor text revision
- Added: Idle timer alternatives


Please, write to [email protected] instead of submitting bugs or questions in an App Store review. We are not allowed to answer reviews and do not have access to user's email addresses. But we do answer each and every email!


Most Helpful Reviews

Version 1.8.0
Review by joseph323

A perfect security system - I'm a financial manager and found this to be the perfect security system I was looking for. I set my sleep time preference to 1 minute and changed security/privacy to ask for password immediately after sleep. Now, as long as I'm in front of the camera the computer is awake and when I leave the system is locked right away.

Found helpful by 12 out of 13 people
Version 1.8.0
Review by DVasquez8

Cannot Be Removed!? - This review is not so much about how it works but how it is now a permanent fixture on my machine. It WILL NOT DELETE/UNINSTALL. I have tried everything and it can not be removed. That's a deal breaker. Regardless of how n app works I would like the freedom of choice to remove it if I want to. Do not get this app unless you want to carry it forever.

Found helpful by 7 out of 15 people

More Reviews for Current Version

Version 1.8.4
Review by Kevin_Dosi

Needs work - I didn’t enjoy finding out that all of the sensors (except face detection) require in app purchases after already buying the software but, if it worked well, it would be worth it. Playing with it, it’s not bad but needs work. The face recognition seems fine to me, as long as my head doesn’t happen to be resting on my hand or something. The sound sensor doesn’t seem that great. It’s either way too sensitive (picking up the sound of my fan, I assume) or too hard to notice me 6 feet away watching a movie on my laptop. Network sensors should include uploads and downloads over the wifi network, and they don’t seem to. When I tried to stream a movie from my computer to another computer in the house, it still went to sleep. Motion sensor doesn’t work at all. Even when i put my camera in a drawer, it recognizes motion that isn’t there, unless my pencils are coming to life.

Found helpful by 3 out of 4 people
Version 1.8.4
Review by @courtneyBolton

my favorite - I deleted Caffeine. "Should I Sleep” app just offers so many more robust features! They’ve done a great job. I only wish the motion sensors worked better, I find that setting to be a lot less reliable than the timers [email protected]

Found helpful by 2 out of 2 people
Version 1.8.4
Review by chrischram

Can’t see my face! - I checked in the mirror earlier today; I DO have a face. Yet this app can’t recognize it as a face, and tries to sleep, even when I’m directly in front of the screen, and pretty close.

Found helpful by 2 out of 3 people
Version 1.8.4
Review by Wazzles

Should be a part of OS - Excellent app for automatically controlling Mac’s sleep function. Used to have issues with my MBPr falling asleep when I didn’t want it to. Installed app, bought all sensors. Now I don’t have those problems, and I’ve hardly even looked at the app since I bought it.

Found helpful by 1 out of 1 people
Version 1.8.4
Review by bsdjunkie

Truely one of my favorite apps! - This has become one of my ‘must-have’ apps for the Mac! Right next to 1Password!! I heard about this app on one of the Mac podcasts that I listen to. When I heard of all the ways that it can prevent sleep, I just had to give it a try! Very intelligent design and well thought-of application! I am very happy with it. I had one issue early-on and the support was very kind and helpful! Now I can’t live without this app. Because of it, I now use sleep on my Mac at work and MacBook Pro at home and save energy! Please keep up the good work!!! Highly recommended! TEN stars!

Found helpful by 1 out of 1 people