OwnCycle — Menstrual cycle

Velthaen

About this app

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.

What’s new

- Tap any day on the calendar to open its sheet: cycle phase, emotional pulse and everything you can log there.
- Mark or unmark bleeding and ovulation, and add or edit the daily log, without switching layers.
- The map guide now sits under the calendar and starts expanded.
- Fixed: picking a date no longer shifts the day around local midnight.