月事LunaCue：經期提醒

Log the start and end of your period — two dates, nothing else. LunaCue works out when the next one is due, reminds you on the day, and can send that same reminder to your person. LOGGING Tap a day on the calendar to mark it; tap again to undo. Past days are fine. After two complete records, cycle length becomes the median of your last six intervals. REMINDERS FOR YOU Four local notifications: estimated first day, estimated last day, three days past the estimate, and the start of the estimated fertile window. 8:00 by default, each with its own switch. The fertile window stays off until you turn it on; it is worked out from dates alone and is not a method of contraception. REMINDERS FOR THEM Pick a message or write your own, generate a link, send it through any messaging app. They can add it to Google Calendar or the iPhone calendar, and it goes off on the day. The link carries only the next estimated date, your message, the reminder time, and language — never your history. YOUR DATA STAYS ON YOUR DEVICE No account, no sign-in, no server, no ads, no tracking, and it works offline. Back up to a file, or to your own iCloud account.