Inputs in the URL
Date, time, zone, month, display, latitude, and longitude values can remain visible in the address you request or share. Share a result address only when you want its calculation inputs included.
Hosting records
The hosting provider may process ordinary request information such as IP address, user agent, requested path, response status, and timing for security and operations.
Cookies and analytics
The calculators do not require an account, cookies, advertising profile, or analytics event to complete a calculation.
Your journals
Observation notes, sleep diaries and cycle-start records are saved in this browser on your device. They are not submitted as journal records. Exported files include the dates and notes you entered; share them only with your chosen recipient.
External links
Links to other websites lead to services that operate under their own privacy policies.