Period tracker, ovulation calendar, fertility and pregnancy tracker with AI cycle insights in one private app. Estri predicts your next period, PMS and fertile window, explains what your body is doing today, and answers your cycle questions in seconds. No ads. Your data is never sold.
NEW: CONCEIVE MODE
Trying to get pregnant? See your chance of conceiving today, a countdown to your fertile window and your most fertile days. Log ovulation (LH) tests, see key dates at a glance, and know the right day to take a pregnancy test.
PERIOD TRACKER & PERIOD CALENDAR
• Period predictions that learn your pattern, even with irregular periods or PCOS
• Color-coded period calendar for period days, fertile days and ovulation day
• Period diary: log flow, cramps, mood, cravings, energy, sleep and 40+ symptoms in seconds
• Period reminders, PMS alerts and late-period notifications
• Cycle length, period length, regularity score and cycle length trend
OVULATION TRACKER & FERTILITY CALENDAR
• 6-day fertile window and ovulation day predictions
• Basal body temperature (BBT) and cervical signs
• Daily fertility insights for trying to conceive (TTC)
• Discreet pill, patch and injection reminders if you're not trying to conceive
DAILY BODY BRIEF: KNOW YOUR PHASE
Every morning Estri explains your phase (menstrual, follicular, ovulation or luteal), hormones, mood, energy and what to expect today, tuned to your exact cycle day.
ASK ESTRI, YOUR AI HEALTH COMPANION
Ask about late periods, cramps, spotting, mood swings, hormones or fertility and get a cycle-aware answer in seconds, judgment-free, 24/7. Estri knows your cycle day and remembers your patterns, so answers are about you, not generic.
PREGNANCY TRACKER & DUE DATE CALCULATOR
Positive test? Switch to Pregnancy Mode in one tap for week-by-week baby size, length and weight, a due date countdown, trimester timeline and pregnancy-safe nutrition.
CYCLE-SYNCED NUTRITION & MEAL SCANNER
• Smart Meals: phase-matched foods and meal ideas for cramps, cravings and energy
• AI food scanner and barcode scanner: snap a meal for instant cycle-aware nutrition insights
HYDRATION TRACKER
Water goal, one-tap water log, cycle-aware water reminders and a hydration report.
MEDITATION & BREATHING
Guided breathing and meditations for cramp relief, PMS stress, anxiety, focus and better sleep, matched to your cycle phase.
CYCLE REPORTS & DOCTOR-READY PDF
AI cycle reports after every finished cycle, personalized trends, and a Medical Health Report you can export as a clean PDF for your gynecologist in one tap.
PARTNER CONNECT
Share your cycle with your partner in real time. They see your phase and daily updates with tips to support you through PMS, period and fertile days, and you can send each other care notes.
PRIVATE BY DESIGN
No ads. We never sell your data or share it with advertisers. App Lock with Face ID, Touch ID or PIN keeps Estri for your eyes only. Guest mode, Apple or Google sign-in to sync across devices, delete anytime.
MORE
• Dark theme and light theme
• 11 languages: English, Hindi, Spanish, Portuguese, French, German, Russian, Ukrainian, Japanese, Arabic and Persian
• Refer a friend and you both get 7 days of Premium free
FOR EVERY STAGE OF LIFE
First period, teens, irregular cycles, PCOS, trying to conceive, pregnancy, postpartum and perimenopause: Estri adapts as your body changes.
ESTRI PREMIUM
Some features need an optional auto-renewing Premium subscription. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings.
Estri is not a medical device and should not be used as contraception. It does not diagnose, treat, cure or prevent any condition. Please consult a healthcare professional for medical concerns.
Privacy Policy: https://periodstracker.com/privacy
Terms of Use: https://periodstracker.com/terms
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