Period Tracker: Ovulation Date

Period Tracker is an offline-first, private, encrypted period tracker, ovulation tracker, fertility tracker, and menstrual cycle tracker: your reproductive health data stays on your device unless you personally choose otherwise. No account required, no ad-tech reading your cycle data, and no cloud sync unless you turn it on — encrypted end-to-end with AES-256 when you do. Log your period on a simple period calendar, get an accurate period predictor and fertile window calculator, use it as a PMS tracker and mood log, and get period predictions that improve the more you use the app. Whether you're tracking your cycle for general health awareness, trying to conceive (TTC), currently pregnant, or navigating perimenopause, Period Tracker reshapes its predictions, insights, and home screen around whichever life stage you're actually in — not the same screen no matter your stage. KEY FEATURES 🩸 Period & Cycle Tracking Log your period in seconds on a simple period calendar and get an accurate period predictor for your next period, cycle length, and period length — refined automatically from your last 3–6 cycles like a proper cycle tracker should, not a rigid 28-day guess. 🌸 Ovulation & Fertile Window Prediction See your fertile window and use the built-in ovulation calculator to predict your ovulation day on the calendar at a glance. Confirm ovulation precisely with a basal body temperature (BBT) tracker and automatic shift detection. 🤰 4 Tracking Modes for Every Life Stage Switch between Cycle Tracking, Trying to Conceive (TTC), Pregnancy, and Perimenopause. Each mode reshapes predictions and the home screen around what matters right now — conception charts for TTC, a week-by-week pregnancy tracker with due-date countdown, or relaxed prediction expectations for perimenopause. 📝 Detailed Daily Logging Track flow intensity, PMS symptoms, and ~60 symptoms in total across 9 categories (head, face, body, digestion, general, emotions, sexual activity, cervix, discharge) with a built-in symptom tracker and mood tracker, plus contraception, sexual activity, notes, medication, temperature, and weight. Fully configurable — show only the sections you care about. 📊 Cycle Statistics & Insights Cycle length and period length trends, BBT charts with ovulation shift markers, symptom and mood frequency, conception probability by cycle day, and a full chronological timeline of your tracked history. 🔒 Locked Behind a PIN or Your Fingerprint Add a PIN or biometric lock (fingerprint / Face ID) so your cycle data stays private even if someone else picks up your phone. ☁️ Optional Encrypted Cloud Backup Your data lives locally by default. If you want a safety net, opt into cloud backup — encrypted end-to-end with AES-256 before it ever leaves your device, so not even we can read it. 📤 Export Your Data Anytime Download your full cycle history as CSV or PDF anytime — no lock-in. 🏠 Home Screen Widgets Period countdown, ovulation countdown, and a weekly overview widget — see your cycle without opening the app. 🔔 Smart, Private Reminders Period, medication, contraception, and daily logging reminders — plus a Secret Reminder Mode that swaps health details for a generic notification when discretion matters. 🎨 Calendar Themes Personalize your calendar with a range of free and premium theme packs. 🌍 5 Languages Perfect for anyone who wants a period app and ovulation tracker that treats reproductive health data as genuinely private — no account required, no data mining, no surprises. 📌 Important Information Period Tracker does not provide medical diagnosis or medical advice and should not replace consultation with a qualified healthcare professional. It should not be used as the sole method of contraception, pregnancy prevention, fertility treatment, or diagnosis of medical conditions. Predictions are estimates based on the data you enter and natural biological variability.