
WO Calendar
Period, Fertility & Pregnancy
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Free
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About
WO Calendar is a simple and private calendar for your period, your intimate life and your pregnancy. No sign-up and no ads: your data stays on your iPhone.
KNOW WHAT'S COMING
• Next period prediction based on your own cycles
• Fertile window and ovulation right on the calendar
• Your cycle day, and a heads-up when your period is late
• "My period started today" in one tap
LOG YOUR DAY IN SECONDS
• Flow: light, normal or heavy
• Intimate days, with or without protection
• Mood, symptoms and personal notes
UNDERSTAND YOUR BODY
• Average cycle length and the history of your last cycles
• Flow distribution and your most frequent symptoms
• A PDF report to take to your doctor
REMINDERS
• Your period is coming in 2 days
• Your fertile window starts today
• Daily birth control pill, at the time you choose
PREGNANCY, WEEK BY WEEK
• Gestational age from your last period or due date
• Your baby's size every week
• Appointments, tests and vaccines, weight and a symptom journal
• Bump photos, kick counter and contraction timer
• Hospital bag checklist
• A beautiful card to share the news
HOME SCREEN WIDGET
See your cycle day and next period, or your pregnancy week and baby size, without opening the app.
PRIVATE BY DESIGN
• No account, no sign-up
• Your data stays on your device
• Lock the app with Face ID or your passcode
• Export and import a backup whenever you want
Available in English and Portuguese.
WO Calendar is not a method of contraception and does not replace medical advice. Predictions are estimates based on the data you enter.
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What's New in WO Calendar
1.2.0
October 17, 2026
A big update to WO Calendar: • Predictions for your next period, fertile window and ovulation • Mood, symptoms and notes for each day • Mark intimate days as protected or unprotected • New statistics with your cycle history and a PDF report for your doctor • Reminders for your period, fertile window and daily pill • Lock the app with Face ID • Home Screen widget • Pregnancy mode, week by week: appointments, weight, kicks, contractions, bump photos and a card to share the news • A fresh new look with Liquid Glass
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