Chronoflag

Server-authoritative timing

Everyone.
On the same
second.

A shared stopwatch for people who need to act together—without accounts, setup, or arguments about whose clock is right.

Open app See how it works ↓
  • No account
  • No configuration
  • EU hosted
Live / 001Server sync
Running± SERVER

One clock lives in the cloud.

Every screen follows it.

Zero ceremony

Open. Start. Share.

  1. 01

    Start instantly

    Open the app and press start. The cloud records the authoritative moment—your phone is only the control.

  2. 02

    Give control

    Share the private Control link with officials or teammates. They can operate the same clock from anywhere.

  3. 03

    Broadcast live

    Publish the separate Live view. Spectators follow in real time without gaining control.

Built for real operations

Simple at first tap.
Serious when needed.

Multiple clocks

Run independent stopwatches side by side. Each clock has its own start, lap, pause, and reset.

Concurrent control

Operators at opposite ends of a course act on one server timeline, from any modern device.

Live synchronization

Boards update continuously. The server—not a drifting browser tab—determines elapsed time.

Export

Keep the record when the session ends with structured JSON and CSV data exports.

One primitive, many uses

Time belongs to the event.

Amateur racingTrainingWorkshopsLive eventsLabsTeams

Officials at the start and finish. A coach and an athlete. A stage manager and every backstage screen.

Chronoflag gives them one shared source of truth.

Ready when you are

Your clock is
one tap away.

Open Chronoflag

No signup. Start free. Share immediately.