Rock Paper Scissors or Rock Paper Scissors Shoot?
This is partly a regional language question and partly a fairness question. Those are not the same thing.
The Direct Answer
People use both counts. In casual play, some groups throw on the word Scissors and stop there. WRPSA competition uses Rock, Paper, Scissors, Shoot because the final word works as a neutral release signal instead of one of the actual throws.
Why Both Versions Exist
Rock Paper Scissors spread through a lot of regions without one global spoken standard. That means some people learned a three-word cadence, some learned a four-word cadence, and some learned number counts instead of either one. None of that is surprising. It is what folk games do.
The Real Difference Is Timing
The argument is not only about wording. It is about when the reveal happens. If the final spoken word is Scissors, the cue is tied to one of the throws themselves. If the final spoken word is Shoot, the cue is neutral. That makes synchronized reveals cleaner and disputes easier to settle.
What WRPSA Uses
WRPSA uses the four-word cadence with the reveal on Shoot. That is the official competition standard because it reduces ambiguity, helps referees spot early or late throws, and keeps the release cue separate from the move names. The full officiating explanation lives in Why We Use Rock Paper Scissors Shoot in Professional Tournaments.
This Does Not Mean Casual Play Is "Wrong"
If two friends both understand the count they are using, casual play is fine. Problems start when players learned different versions and do not realize it until one of them has already thrown. Competition solves that by standardizing the cadence before the match begins.
The Naming Question Is Similar to Roshambo
A lot of RPS arguments are really regional-language arguments wearing game clothes. Roshambo is another obvious example. If you want the naming-history version of this phenomenon, read Roshambo.
The Useful Short Version
If someone asks whether it is Rock Paper Scissors or Rock Paper Scissors Shoot, the clean answer is this: both exist in ordinary speech, but WRPSA competition uses Shoot because a neutral final cue makes the reveal fairer and easier to officiate.