Oh, bull. Yes, those are referred to as apps, but so are desktop computer software program(me)s, to use a number of terms that don't contain the string "app"... and which have been called "applications" or "apps" since at least the 90s and probably longer. Unless somebody specifies "Metro" or "Modern" apps, using the word "apps" to refer to desktop apps is perfectly valid. Calling it wrong isn't even pedantic, just incorrect. It should have been perfectly obvious what was being referred to.