Chorus
A presentation and polling tool where the host opens a room, participants join by QR code from their phones and vote, and the results turn into a live chart on the presentation screen instantly.
Problem, approach, evidence.
Problem
Showing everyone's voice in a crowded hall instantly on screen, from their phones, without making them create accounts.
Approach
A room-based WebSocket architecture; results are aggregated on the server and broadcast in batches at short intervals. A participant who drops the connection continues where they left off with the same identity. Each participant casts one vote per slide.
Evidence
Lighthouse 100 on desktop, 98 on mobile; 1.8 s LCP on mobile, 206 KB total transfer.
Scan it with your phone, try it.
The QR code leads to chorus.beraekimci.com.tr.
Five question formats.
Every vote on screen instantly.
↑ Even with hundreds of votes, the screen updates only a few times per second.
Evidence under load.
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