It’s an online reminder service that warns you when pre-menstrual syndrome (PMS or PMT as it’s known in the UK) is about to hit.
Simply enter the date and length of a woman's last cycle. Women can sign up to send reminders to up to FIVE men in their life.
*Mistress MJ sends link to The Houseboys*
Anything from one to five days notice can be specified, allowing for warnings of various degrees of danger in the form of yellow, green and red alerts.