Flutter uses heart rate and workout permissions to power solo and partner sync sessions. During use, the app processes heart rate data, session state, and haptic settings to deliver real-time feedback across iPhone and Apple Watch.
Heart rate and workout data are used to run active sync sessions and save Flutter sessions to Apple Health when permitted
Profile information such as your first name, optional email address, optional birthdate, invite code, and partner connection status may be stored securely to support pairing, app features, and occasional product updates
Push notification tokens may be stored to deliver invites, session updates, and other app notifications
Flutter uses analytics to understand feature usage, session starts and ends, session length, screen views, button taps, and haptic style selection
Flutter's custom analytics are designed to avoid sending names, partner names, invite codes, or raw heart rate streams for analytics purposes
If provided, your email address is used only for direct product communication such as app updates and new features — never sold or shared with third parties
Flutter does not sell your personal data or use the app for third-party advertising