Question 1

Does MultiBanner work inside packed stadiums with zero cellular reception?

Accepted Answer

Yes. The Android app features built-in Concert Hotspot Mode. The host phone activates a local Wi-Fi hotspot with an embedded lightweight WebSocket server. Nearby devices connect directly over peer-to-peer Wi-Fi with 0KB mobile data consumption.

Question 2

Can iPhone and Android users sync together?

Accepted Answer

Yes. iPhone users simply scan the host QR code or visit multibannerapp.com in Safari. Both platforms synchronize simultaneously over WebRTC DataChannels with zero app installation required on iOS.

Question 3

How many phones can connect in one chain?

Accepted Answer

MultiBanner has been verified with up to 32 simultaneous devices in a single room with sub-millisecond sync lockstep.

Question 4

How does Continuous Billboard Mode compensate for physical bezels?

Accepted Answer

In Continuous Billboard mode, a single sentence is projected across all phones in sequence. MultiBanner calculates physical millimeter gaps between devices, allowing text to glide behind bezels with authentic physical continuity.

Question 5

Is MultiBanner free and ad-free during live shows?

Accepted Answer

Yes. Core synchronization and billboard features are completely free with zero ads during live billboard playback so your concert experience is never interrupted.

Question 6

How do you prevent phone clock drift and video lag?

Accepted Answer

MultiBanner implements Cristian's algorithm to continuously measure round-trip network time (RTT) and adjust local render clocks, maintaining synchronization within 0.12 milliseconds.