A solution for Windows to stay focused. Create set intervals to get away from the screen and do productive things like studying, reading, training, meditating or anything a real sigma does.
You can download it by clicking here. Then you should move it to the Windows startup folder, which you can access by clicking Windows + R, typing shell:startup, and confirming it, which will open the folder in which the programs are started together with the system. Epykteto .EXE should be moved to this folder.