task-homie is described as 'Windows 10 includes an auto-hide feature for the taskbar that unfortunately still displays a few pixels when hidden. task-homie hides even those pixels and also disables the unhiding of the taskbar when the mouse hits the screen edges' and is an app. There are four alternatives to task-homie for Windows. The best alternative is Taskbar Hide. It's not free, so if you're looking for a free alternative, you could try Aviassin Taskbar Eliminator or Buttery Taskbar.