PrivateCycle: Period Tracker

Your cycle, on your phone only. No account, no ads, no trackers, no data sale — ever. Log a period in two taps and get honest predictions that work fully offline.

PrivateCycle is a privacy-first period, cycle, and ovulation tracker that keeps 100% of your health data on your device. No account. No sign-up. No ads. No telemetry. No third-party data sharing — ever. Your body is your business.

Log your period, symptoms, mood, and fertility signals in seconds, and get clear, honest predictions for your next period, fertile window, and ovulation — all computed locally on your iPhone.

WHY PRIVATECYCLE • Local-first: core tracking, predictions, and insights work with no internet and no account. • Your entries are stored in an encrypted database on your device (AES-256). • No ads. No data sale. No hidden trackers or third-party SDKs. • Transparent predictions that are honest about uncertainty instead of faking precision. • Core tracking is free, forever.

TRACK WHAT MATTERS • Period flow — light, medium, heavy, clots — with start and end logging. • Symptoms: cramps, headache, tender breasts, bloating, fatigue, acne, backache, nausea, hot flashes and more. • Mood and feelings, energy, sleep, cravings, digestion. • Discharge, sexual activity and drive. • Measurements: basal body temperature, weight, water, sleep hours, LH and pregnancy tests.

HONEST PREDICTIONS • Next period date with a prediction window, not a false exact day. • Fertile window and estimated ovulation day. • Current cycle phase and a plain-language confidence level. • Irregular cycles and late periods are explained, never silently guessed away.

SEE YOUR PATTERNS • A full cycle calendar with an at-a-glance legend. • Cycle history and averages. • Insights into how your symptoms move with your cycle.

MODES FOR EVERY LIFE STAGE • Cycle tracking. • Trying to conceive. • Pregnancy — gestational age, due-date countdown, weekly summary. • Perimenopause — symptom logging and an irregularity view.

PRIVACY BUILT IN, NOT BOLTED ON • Your data never leaves your device by default. • App Lock with Face ID or Touch ID keeps your entries yours. • Full data ownership: export to JSON, CSV or plain text, passphrase-protected local backup and restore, and one-tap delete-everything. • Reminders are scheduled locally on your device.

PLUS — ONE-TIME UNLOCK, NO SUBSCRIPTION Upgrade once inside the app to unlock: • An on-device AI health assistant — private answers, with nothing leaving your phone. • Advanced insights: your body's patterns, symptom forecasting, and lifestyle-to-symptom correlations. • A clinician report — a formatted, date-range summary to bring to your doctor. • The full pregnancy experience: week-by-week development, body changes, daily tips, kick counter, contraction timer, appointments and checklist. • Full perimenopause: symptom-burden view, timeline and milestones. • Advanced reminders. No ads, no subscription, and the same privacy guarantees. Buy once, keep it.

PrivateCycle provides general educational information about menstrual and reproductive health. It is not a medical device and does not provide medical advice, diagnosis, or treatment. It is not a contraceptive and should not be relied on to prevent pregnancy. Always consult a qualified clinician about your health.

Download PrivateCycle and take control of your cycle, privately.