We have learned to control flashlights on any phone via ultrasound, and the whole room flashes to the music. The phone model doesn’t matter, no internet or app is needed.
Guests scan a QR code, tap “Start”, raise their phones, and the room flashes in one rhythm. The host or DJ controls the light right from the sound desk.
Ready mechanics
- “Light show to the music”: the whole room flashes in time, and afterwards guests vote for the next track
- “Light by groups”: each group lights up when announced, and in the finale the whole room glows
- “Long-exposure photo zone”: the flashlight draws a logo, caption or name in the photo
Right after the show every guest gets voting and a prize draw in the browser.
A fixed price: from 10,000 ₽ per event for up to 100 guests, and you can run it as many times per evening as you like. For larger rooms see the calculator and the pricing article. Guests film the videos themselves.
Ideas for specific celebrations: a New Year party, a wedding, a prom. A short presentation: gromka.show/onepager-party. Book a show on the corporate events and weddings page.
