A fact question
Four options, one of them right. The plain form, and the one a room expects to meet first.
klapp quiz · playable now
A quiz nobody wrote.
You type the topic. That is the writing.
A minute or two later there is a playable round on your screen, and the room is in it from their own phones.
Start a game →Nothing to install · Nothing to join
What happens in the room
You open /host and type a topic. Or paste a block of text. Or hand over a file — txt, pdf, Word, Excel, PowerPoint, an image — and the questions are written from what is in it. Writing a set takes a minute or two.
Then you read it, before anyone plays, and drop any question that is wrong, dull or too close to the bone. Nothing reaches the room that you have not already seen.
Players open /join, or the short code address with the six digits you read out, and they are in. No download, no account, no e-mail. Everyone is handed a name — Bold Badger. Typing your own is possible only when you have said the room is adults only, which is not the default. In the lobby you can swap any name you would rather not read aloud.
Which one doesn't belong
Four things, three of which share something. You are not recalling a fact, you are spotting a pattern.
Higher or lower
One quantity against another. Nothing to recall at all, so a table that knows nothing can still argue.
Swipe the direction
The four options sit in a cross. You swipe toward the one you want. The options are on the phone too, which is why a room with no screen can play at all.
What you do not have to do
No questions to write. No library to browse, no template to fill in, no set to buy from somebody else. Nobody installs anything, and nobody signs in — not the players, and today not you either.
You also do not have to hurry anyone. Answering fast earns nothing here, so the quickest thumb in the room and the person reading every option twice score the same. The countdown is there to make the moment tighten, and when that is the wrong thing for the room you can hide it, on the phones and on the big screen. Hiding it does not stop it: the answer window still closes on time. If the room needs longer, you can give it 10 more seconds while answers are open, and again if that is not enough. Or switch on wait for everyone: then there is no clock at all, and answers close when every connected phone has answered, or when you close them.
What is left for you is small but real: a wait of a minute or two while the set is written, and a minute reading it through. That is the job. Nobody else can do the reading part.
01 / capacity
10 240 at once
Measured 13.09.2026 (commit f427ff0): 10 240 synthetic clients from ten load machines in one Azure region, all connected at once, zero lost answers. Synthetic means scripted connections, not people — no real room that size has played yet. There is no participant limit by design.
02 / the wait
A minute or two
Five sets have logged their generation time on this code: the fastest 34 seconds, the slowest 2 minutes 32 seconds, and a median of 86 seconds across the three measured on 17–18 September 2026. It happens once, before anyone is waiting on you, and it is the only part of the evening that is slower than talking.
Corrected 19 September 2026. This card said 60 to 90 seconds, citing 86 seconds in production and 57 and 90 seconds in tests. The test figures had no record behind them, and one production set took 92 seconds.
Corrected 22 September 2026. This card said about a minute and a half, which was the median of three sets. Two more have been measured since — 34 seconds and 2 minutes 32 seconds — so the median hid a spread of more than two minutes. Both ends are named now.
03 / storage
No names, no single answers kept
A session lives in memory, with a copy in our storage while the game runs, so the game can go on after a server restart. The copy is deleted when the game ends, and the session ten minutes later. No player accounts, and no names or answers from single players are kept. If you are signed in as the host, your rounds are saved on your account, with numbers for each round: how many played and how many answers were correct. Also kept: the topic you typed, in a log for 30 days. See privacy.
What it costs
Nothing to join. A player never meets a price, a card field or a sign-up. And nothing to host: the quiz is free, with no account and no card. Rounds of your own start with 50 free trial questions when you sign in (10 without), and a host who signs in gets events and a higher hourly limit, also free. The one paid thing is Q&A for a talk, priced per session on pricing.
A free quiz is a statement about today, not a promise about next year. What is free and what the limits are is written down and dated on free.
What it is not
A poll is one question inside an event, for a signed-in host; it is not a tool of its own. Audience questions are a separate, paid product (Q&A), not a quiz round. A quiz needs no login; signing in is for events and Q&A. There are no saved question sets, signed in or not, so a round that went well cannot be brought back — you would type the topic again and get different questions. Questions carry no pictures. There are no written-out answers and no teams.
It is not a lesson system and it does not make your slides. It is ten minutes where the room is awake at the same time.
Two rooms have a page of their own: the table and the pub in for parties, the classroom and its limits in for teachers. Who builds this, and why, is on about.