Turn a crowd's phones into one synchronized light show, in time with the music. Open-source web app: scan a QR, the whole audience flashes together. Concerts, clubs, stadiums, parties.
nodejsopen-sourcereal-timewebsocketqr-codeweb-audiopartyconcertclock-synchronizationstadiumlight-showaudience-engagementscreen-flashcrowd-light-showphone-flashlightlight-sync
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Updated
Jul 19, 2026 - JavaScript