A quiet rhythm for your wellbeing

Cycle
Calendar

Track your cycle gently, see an estimate for what may come next, and keep your notes private.

No account. No cloud upload.

Private by design

Your cycle stays in this browser.

Nothing is sent by this tool. Saving is optional and only happens after you choose “Save on this device”.

Not saved on this device

Start with the basics

A simple picture of your month.

Use one recent period date to begin. You can add more dates later so the estimate reflects your own pattern.

What would you like to use this calendar for?

Track onlyA neutral view of your cycle and patterns. Trying to conceiveEstimated fertile timing for planning conversations. Avoiding pregnancyTiming context alongside reliable contraception.

Most recent period started MM/DD/YYYY · Use the first day of bleeding. Average cycle length days Most cycles fall somewhere between 21 and 45 days. Average period length days This helps shade the expected period on the calendar.

Track only

Your month, held lightly.

These dates are estimates for reflection, not medical advice.

Early estimate

Next period estimate —

Estimated ovulation — About 14 days before the next period

Estimated fertile window — Timing can vary from cycle to cycle

Period Estimated fertile window Estimated ovulation Lower estimated fertility

Lower estimated fertility does not mean no chance of pregnancy. Calendar estimates should not be used as contraception on their own.

Keep the picture current

Add a period start

Adding start dates helps the calendar learn your average cycle length. Only the most recent 12 cycles are kept.

A gentle nudge

Add an estimate to your calendar

This creates a local calendar file. The tool does not send push notifications or upload your dates.

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