Privacy Center
Privacy Policies
42cal operates two products with separate privacy policies. Select the product you're using to view the relevant privacy policy.
Last updated: October 27, 2025
MarathonOS Training App
iOS app for marathon training, workout tracking, and coaching
Covers data collection from Apple HealthKit, Strava, Garmin, COROS, coach-athlete relationships, and iOS app usage.
42cal Race Directory
Web platform for discovering and bookmarking races
Covers email collection, bookmarked races, browsing activity, and web platform usage.
Privacy Request
To exercise your privacy rights (access, deletion, correction, or portability), email support@42cal.com with the subject "Privacy Request" and specify which product you're using (MarathonOS or Race Directory).
We will respond within 30 days and may need to verify your identity before fulfilling your request.
Questions?
For questions about our privacy practices, contact us at support@42cal.com