Samsung phones have a dedicated hardware home button (older models). This module turns on the flashlight instantly when you press the Home button while the screen is off. It works flawlessly on TouchWiz when other apps fail.
TouchWiz (later evolving into Samsung Experience and One UI) was often criticized for being heavy and "cartoonish," yet praised for its utility. samsung touchwiz rom xposed framework
: Instead of flashing a new ROM every time you wanted a new feature, you could simply install a "module"—think of the Framework as a console and the modules as the games. Samsung phones have a dedicated hardware home button
Because Samsung modified Android so heavily, many standard Android mods would crash on TouchWiz. samsung touchwiz rom xposed framework