Ovella · Period Callendar

Ovella is a private and lightweight period calendar designed for simple date tracking and personal organization. The app helps users record cycle dates, notes, and daily observations in a clear calendar view. Based on user-entered data, Ovella provides estimated date reminders presented in an informational, non-medical format. Users can add personal notes, moods, and activities, browse past entries, and view summaries that help organize historical data over time. All features are designed for personal reference only. Ovella includes optional tools such as data export (PDF/PNG), privacy mode, PIN and biometric protection, and customization options. The app works fully offline and stores all data locally on the device. Optional backups can be saved to the user’s private Google Drive. A dedicated timeline mode is available for informational overview purposes only. Ovella is not a medical device and does not provide medical advice, diagnosis, treatment, or health