Clockwatts: Power measurement
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Everyone
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About this app
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
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
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
What’s new
The app now allows you to measure power in almost any vehicle, from electric scooters to heavy-duty vehicles.
App support
About the developer
Joni Hernesniemi
joni@loansync.info
Uuhonkuja 6
60510 Hyllykallio
Finland
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