Calculate your ovulation, fertile window and next period day-by-day using the medically standardized 14-day luteal phase method.
Reminders for the people you love, sent straight through WhatsApp
Stage
Not given
Not given
Founded
Not given
Not given
Based in
NL
GB
Pricing model
Free
Freemium
Pricing
Not given
Free: up to 2 people, 1 reminder a day for each, daily I'm OK and safety word. Plus: £3.99/month (billed monthly) or £39/year (billed yearly, 2 months free), up to 6 people, 5 reminders a day for each, message every time it's done. 7 days free trial for Plus.
Key features
Calculates ovulation date based on cycle length and luteal phase method
Predicts 6-day fertile window
Forecasts next period date
Displays 3-month cycle preview
Customizable cycle length input
Identifies highest fertility days
Guidance for irregular cycles
Send reminders through WhatsApp
See when reminders are completed
Schedule reminders for specific times
Daily check-in reminders
Safety word alerts for emergency situations
Recurring reminders on set schedules
Notifications if reminders are missed
Support up to 6 people on Plus plan
Gentle nudges for forgotten reminders
Calendar view of upcoming reminders
What makes it different
Uses medically standardized 14-day luteal phase method per Wilcox 1995 and ASRM 2023
Completely free to use
Part of comprehensive pregnancy and family planning platform
No app download required, works entirely in WhatsApp
Recipients only need WhatsApp, no account setup required
You see confirmation when reminders are completed, not just reminders sent
Free forever plan available
Safety word feature alerts entire circle simultaneously
Mamenza
I'm OK