All can be used to describe one thing or many, while whole is only used for single things. Whole will also follow an article or number or something. "I ate all of the apple", "All people like to eat" "I ate the whole apple"

'Whole' means 'entire'. It is used to describe something that is unbroken (ie. that is missing no pieces). For example, 'a whole cake' is one entire cake (as opposed to slices of the cake). 'All' is used to collectively describe every single thing. Ex. All people = All seven billion people that exist.

Both the words (all and whole) mean "to collect" but whole means to collect with mass also while all means to collect only without mass. Does it help you...?

"all" for countable "whole" for uncountable and countable as one complete thing