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Why is calendar permission needed?

To write predictions to your Google Calendar and update future events together when the actual date changes.

Only one permission: view and edit accessible calendar events

What we do not store

• Your period history or accumulated past records
• Symptoms, physical condition, or other health details
• The contents of your other calendar events

For cycle prediction, we store only your settings, latest start date (overwritten each time), and IDs of events we created. Future prediction dates are calculated when needed.

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