use ctrl+shift+b for a poor version of boxcutter and save some money

you have to enable bool tool first



to use it select the object you want to cut with first and the main object second with shift and press the ctrl+ shift+b
and choose from the menu
yes you can do custom shapes as well

i just saved you 15-20 $


its funny how this people just make a interface for a already existing capablitiy and shamelessly selling it on blender market ;)