You may know handful of applications that can lead you to be more productive, Sandman is one of them, it is free, open-source and cross-platform application available for Linux, Windows and Mac. It notifies you about your sleep timings that you need to get 7-8 hour of sleep everyday and keep yourself energized and refreshed. First you need to tell the Sandman at that time you need to wake up the next day, and then it tell you when you should go to bed. Now a days like everybody uses their cellphones as an alarm clock, which just wake you up not tell you to sleep.
It works in a way that tells you two things when to give you bed time alerts; your working hours and when you need to wake up. The app learns what times a user works and tells them when enough is enough and they should go to bed. This application is in active development that means if you find any kind of bug or missing feature then report to developer.

Sleep Notification: Notifies you when optimal rest times occur that are generated by the algorithm and recommends a shutdown.
Out of sight, out of mind: lives in the task bar the beauty of Sandman is its ability to run in the background.
Avoid Overworking: notifies you if your computer's up-time extends beyond 12 hours, to help you stay productive and efficient.

How to install?

To install Sandman in Ubuntu/Linux Mint download the deb file and replace download file name in the first command:

Download Sandman

That's it
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