The spreadsheet always loses in the end
A guest list begins sensibly enough: one tab, names down the side, a column for yes or no. Within a week it has a second tab for the plus-ones, a note buried in a row saying the Kowalskis are bringing a friend, and a headcount you no longer trust. The trouble is not the spreadsheet. It is that the list and the replies live in different places, and you are the one carrying answers between them.
A guest list app worth the name closes that gap. Names, invitations, confirmations, companions and the outstanding few all belong to one record. When a guest replies, the answer lands on their row by itself. You stop typing the same information twice and start reading a number you can hand to the caterer without flinching.