OwnCycle — Menstrual cycle

OwnCycle is a menstrual cycle journal that runs entirely on your phone. No account, no ads — and no internet permission at all: your data cannot leave your device, because the app literally cannot connect.

Predictions built for real cycles
Not every cycle is textbook, and OwnCycle is designed around that:
• Cycle length is computed with medians, so one odd cycle won't throw your predictions off.
• If your cycle is irregular, the app says so clearly and shows an uncertainty margin next to every prediction — instead of faking precision that isn't there.
• If you log your ovulations, it learns your actual luteal phase and fits the fertile window to your body, not to the textbook "day 14".

Effortless daily logging
Record bleeding, symptoms and mood in seconds. The calendar shows phases, fertile window and upcoming periods at a glance, and over time it surfaces your personal patterns.

Discreet reminders
Upcoming-period and fertile-window alerts show only a generic message on your lock screen. What they actually say stays for your eyes only.

Your data, actually yours
• Everything is stored on your phone only.
• Password-protected, encrypted export (AES) for backups or moving to a new phone.
• Share with your partner on your terms: you choose what, when and how.
• No analytics, no trackers, no "data partners". The full privacy policy takes a minute to read, right inside the app.

Make it yours
Multiple visual themes (skins) so the app feels the way you want — including the tone of its reminders.

Important note
OwnCycle is a tracking and wellbeing tool. It is not a contraceptive method or a medical diagnostic tool; for health decisions, always consult healthcare professionals.