LapViz Stopwatch

LapViz Stopwatch, the collaborative lap timing app

Time the laps of your drivers from the pit wall, without transponders: tap a button at each passage, LapViz Stopwatch computes the lap times, the best laps and the statistics of every driver, and shares them live.

Time several drivers at once

One button per driver: karting, cars, motorbikes or horses, the stopwatch follows everyone on track.

Large buttons on the screen, or a Bluetooth keyboard or remote for the passages
Lap times, best laps and statistics of each driver, computed as you go
A lap timed by mistake is deleted in one tap and can be restored

Share the timing live

Create a session and invite the other timekeepers: the laps of every phone are gathered in real time, even when each one times other drivers.

Laps in progress, sectors and deletions shared live
Leave and join a session again at any time
Automatic reconnection after a network loss or when the phone wakes up

Followed by everyone

Drivers, parents and team-mates follow the session in their browser on the live timing page, without installing anything.

A link to share with your team
On Android, LapViz devices are also received over Bluetooth: their passages and sectors are timed to the millisecond

Frequently asked questions

Is LapViz Stopwatch free?

Yes. The app is free on Google Play and on the App Store, and so is the live sharing of the sessions.

Do I need transponders or timing loops?

No. You time the passages by hand from the side of the track, or with LapViz devices that broadcast their laps over Bluetooth.

Can several people time the same session?

Yes. Each timekeeper joins the shared session from their phone and the lap times are gathered in real time.