Quizbowl
Beta
A live quiz app for rooms with bad Wi-Fi and one projector.
Everyone has their own phone, so everyone has their own buzzer. The scores go on the big screen, the questions go on the big screen, and nobody installs anything. It exists because I ran a pub quiz for two hundred people in a function room where the venue’s DNS ate the first two rounds, and I decided never again.
Beta means you can run a real quiz with it and I will fix it if you tell me it is broken. It has been used for eleven events, the largest of which was 212 people. The buzzer path is the part I trust most and the projector layout is the part I trust least.
What it looks like
The projector view. Readable from the back of a function room, which took three rewrites. 
The phone view. One button, deliberately.
Backstage · Quizbowl Feed
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The scoring screen finally survives a projector — Got the scoring screen working on a projector at 1080p; phones still lag about a second behind on the reveal. Suspect the websocket fan-out, not the render.
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Rewrote the buzzer path to trust the server clock instead of the phone’s. Ties dropped from “constant” to “twice in forty rounds”. — Rewrote the buzzer path to trust the server clock instead of the phone’s. Ties dropped from “constant” to “twice in forty rounds”.
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First real run: 38 people, one projector, one very hot laptop. It held. — First real run: 38 people, one projector, one very hot laptop. It held.