Clockwatts: Power measurement

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À propos de l'application

Clockwatts turns your smartphone into a virtual dynamometer that measures your vehicle’s power while driving. The app is designed for track use.

Power is no longer just a number in the specs
The app measures your vehicle’s real-time and peak power and automatically stores all data for later analysis. This allows you to focus on driving and review the results afterward.
• Works fully independently without external devices or vehicle connections.
• Utilizes your phone’s GPS and built-in sensors to calculate power and speed.
• Compatible with almost any type of vehicle, whether it’s an electric scooter, motorcycle, passenger car, or heavy-duty vehicle.
• Measurement settings can be customized for different vehicles and driving conditions.
• For best results, determine your vehicle’s total weight as accurately as possible before measurement. The settings include example values for other parameters.
• Use the app on a flat surface and preferably in calm weather to ensure the most accurate results.

Power Measurement Report
When the measurement ends, the app automatically generates a clear report of the test results.
• The report includes a line chart showing the vehicle’s power and speed over the measurement period.
• The chart can be saved for later analysis.
• With the phone’s internal GPS, the maximum measurement duration is typically 30–60 minutes.
• With an external GPS device, the maximum duration is about 10 minutes.

Support for External GPS Devices
• The app supports the RaceBox Mini device, which provides significantly faster location updates and more accurate measurement results.
• It also includes a feature that takes uphill and downhill gradients into account during power measurement - this feature is available only when using the RaceBox Mini device.

If you know your car’s exact frontal area, rolling resistance coefficient, and drag coefficient, enter them in the settings – this will provide even more accurate measurement results.

Example values for the aerodynamic properties of passenger cars can be found on the app’s website:
https://www.clockwatts.com/Car-listing/

Terms and Conditions:
https://www.clockwatts.com/terms-and-conditions

End-User License Agreement (EULA):
https://www.clockwatts.com/end-user-agreement
Date de mise à jour
7 ɔtb 2025

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La sécurité, c'est d'abord comprendre comment les développeurs collectent et partagent vos données. Les pratiques concernant leur confidentialité et leur protection peuvent varier selon votre utilisation, votre région et votre âge. Le développeur a fourni ces informations et peut les modifier ultérieurement.
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Nouveautés

The app now allows you to measure power in almost any vehicle, from electric scooters to heavy-duty vehicles.