How to Sync Multiple Displays as a Stage Clock – Step by Step

The Problem: Timers Drift Apart

When first setting up multiple displays as a stage clock, most people reach for the obvious solution: a timer app on each device, started manually. The result: the clocks drift apart within minutes, because each app counts its own time and nobody taps "Start" at exactly the same moment.

Even with a perfect manual start, offsets occur due to:

• Different processor loads on each device
• Tap latency
• No shared time reference

A speaker timer showing 2:45 on display A and 2:51 on display B confuses production and unsettles the speaker.

Solution 1: AirPlay Mirroring (Simple, but Limited)

The quickest approach: one iPad as the timer source, mirrored via AirPlay to additional screens. Everyone sees the same image.

Advantages: No extra software, works immediately.

Disadvantages:

• AirPlay has latency — the mirrored screen lags behind the source by 50–200 ms
• All displays show exactly the same view, including the production interface
• Scales poorly beyond one or two AirPlay receivers
• If the source device fails, all displays go dark simultaneously

For a single monitor output on a small stage this works fine. For professional setups with multiple rooms or many displays, it falls short.

Solution 2: Dedicated Network Synchronization

The professional approach: each display runs as its own app instance and receives the timer state from the production device over the local network. No mirroring, no image-transmission latency — only the timer value is synchronized.

How it works in practice:

1. One device takes the host role — typically the production iPad or iPhone
2. All other devices are displays — they automatically search for the host on the network
3. The host continuously broadcasts the current timer state — all displays render it locally
4. Result: millisecond synchronization, regardless of how many displays are connected

Setting It Up with UbiStage Timer

UbiStage Timer is a stage clock app for iPhone and iPad that implements exactly this approach. Setup takes under a minute:

That's it. No typing in IP addresses, no config files, no setup overhead.

What You Need

• Wi-Fi router or hotspot — even an iPhone hotspot works for small setups
• Enough devices — UbiStage Timer supports unlimited displays
• Power supply — plan for charging cables on longer events

Typical Use Cases

Conference with multiple speaker timers: One iPad at production, one iPhone or iPad per speaker position. All show the same countdown.

Stage production: Monitors backstage, displays at the FOH position, and screens in the wings all show the remaining time to the next scene — in perfect sync.

Panel discussion: The moderator sees the total remaining time on their iPad, while the panelists see the same timer on a display at the front of the stage.

Conclusion

Running multiple displays as a synchronized stage clock is straightforward with the right app. The key is network synchronization instead of screen mirroring — that's what keeps all displays accurate to the millisecond.