# Chronos-Rowing Clocker

> Accurate timekeeping for rowing competitions with GPS synchronization.

Canonical page: [https://chrome-stats.com/d/nl.chronos\_rowing.clocker](https://chrome-stats.com/d/nl.chronos_rowing.clocker)

## Overview

- **ID:** `nl.chronos_rowing.clocker`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Cornelis Zwart
- **Category:** TOOLS
- **Downloads:** 13
- **Last updated:** 2026-08-28
- **First published:** 2026-06-23
- **Publisher country:** NL
- **Data as of:** 2026-09-09
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=nl.chronos_rowing.clocker)
- **Website:** [https://chronos-rowing.nl/](https://chronos-rowing.nl/)
- **Privacy policy:** [https://chronos-rowing.nl/api/privacy](https://chronos-rowing.nl/api/privacy)

## Description

Chronos-Rowing Clocker is a timekeeping app specifically developed for timekeepers at rowing competitions.<br><br>The app automatically synchronizes with GPS and uses a Kalman filter to calibrate the system clock to the nearest millisecond. This ensures that every mark is captured at exactly the right moment.<br><br>Features:<br><br>• GPS time synchronization with accuracy up to ±14 ms<br>• Large MARK button for fast and reliable timekeeping<br>• Overview of all marks with exact timestamps<br>• QR code scanner for easy connection to the server<br>• Activation via volume button possible<br>• Works with the Chronos-Rowing server

## Rankings

- #2,739,732 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/nl.chronos_rowing.clocker)