Period Tracker : Cycle Diary

Track your cycle, fertile window & ovulation. Password-protected & private. Try free today.

Whether you're tracking your period, trying to conceive (TTC), managing PCOS or endometriosis, or simply wanting to understand your body better — this app gives you the tools to take charge of your cycle, privately and securely.

⌘ PRIVATE BY DESIGN Your health data is deeply personal. Period Tracker includes a password-locked calendar so your cycle history, symptoms, and logs stay completely private. No account required. No data sold to advertisers.

⌘ WHAT YOU CAN TRACK Menstrual flow and cycle length Ovulation day and fertile window Cervical mucus and basal body temperature (BBT) Mood, energy, PMS symptoms Weight, BMI, and sexual activity Birth control and pill reminders

⌘ BUILT FOR REAL CYCLES Irregular cycles? No problem. Whether you have PCOS, endometriosis, or simply unpredictable periods, Period Tracker adapts its predictions to your unique cycle history — not a textbook average.

⌘ TRYING TO CONCEIVE? Pinpoint your fertile days, track your luteal phase and follicular phase, and get daily pregnancy chance insights. Designed for women on a TTC journey who want data, not guesswork.

⌘ SMART REMINDERS Set personalized reminders for your next period, PMS, ovulation, and birth control. Get alerts when your cycle changes unexpectedly.