Last updated: June 17, 2026
This Privacy Policy describes how KogTrainer (the "App") handles personal information. By using the App, you are deemed to have agreed to this policy.
To calculate training zones, the App stores the following information on your device:
· FTP (Functional Threshold Power)
· Maximum heart rate
· Resting heart rate
· Body weight
The following data is stored on your device as a record of your training:
· Workout type, duration, and structure
· Measured values for power, heart rate, and cadence
· Derived values such as TSS (Training Stress Score)
Real-time measurement data from Bluetooth-enabled power meters, heart rate monitors, and cadence sensors. This data is acquired only during a workout and processed on your device.
When you connect with Strava, the App obtains an access token via OAuth authentication. The App uploads the data of workouts you complete in the App (time-series data such as power, heart rate, and cadence, along with the workout name) to Strava. The App uses upload-only permission and does not read your activity data on Strava. Strava may also collect Usage Data related to the App's use of the Strava API and use it for purposes such as improving its services, providing support, and ensuring compliance with its terms.
Collected information is used solely for the following purposes:
· Calculating power zones and heart rate zones
· Creating, executing, and recording workouts
· Displaying and analyzing training history
· Providing AI workout generation
· Enabling integrations with external services such as Strava
AI workout generation uses only the rider profile and workout data stored on your device and does not use any data obtained from Strava.
As a rule, all data collected by the App is stored only on your device. Data is sent to external servers only when you explicitly use an external service integration (such as Strava).
The developer will not provide your personal information to third parties except in the following cases:
· When you have given your consent
· When required by law
· When you use an external service integration (the privacy policy of the connected service then applies)
Because App data is stored on your device, uninstalling the App deletes all of it. You can disconnect the Strava integration from inside the App or from your Strava settings.
We take appropriate technical measures to protect your data, but the security of data transmitted over the internet or electronic storage cannot be guaranteed to be 100% secure.
The App is not intended for children under 13. We do not knowingly collect personal information from children under 13.
This Privacy Policy may be updated from time to time. Material changes will be announced within the App.
For questions about this Privacy Policy, please see our Support page.
The Japanese version of this Privacy Policy shall be the authoritative text. This English version is provided for reference only. In the event of any discrepancy or inconsistency between the Japanese version and any translated version, the Japanese version shall prevail.