In testing · launching December 2026

The period tracker that never asks who you are.

A free period tracker, ovulation calculator and period calendar in one app — with no account, no ads, and nothing sold.

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Cycella's Today screen, showing cycle day 23, a period predicted in about 6 days, and a heads-up card with tips for the week ahead
No account, ever Built for Nepal & India No ads, nothing sold End-to-end encrypted backup
Your cycle. Your own rhythm.

Built on your own cycles, not a generic 28-day guess. Log your period, mood, symptoms and pads in three taps. We're testing it now and launching in Nepal and India this December.

Cycella period calendar with logged and predicted cycle days
Period calendar & ovulation calculator

See your whole month at a glance

Cycella's period calendar shows your logged periods, predicted periods, fertile window and ovulation day in one view. It's a period tracker and ovulation calculator working off the same data, so predictions get sharper the more you log — built from your actual pattern, not a generic 28-day guess.

Estimates only, and not a method of contraception. See our FAQ.

Cycella cycle insights screen
Know what's normal for you

A clear picture, ready for the doctor

Six cycles, charted against the normal range, so you can see at a glance whether your pattern is steady or shifting. When it's time to see a doctor, Cycella can turn your log into a summary you can bring with you — instead of trying to recall months of dates from memory.

Read why tracking helps at the doctor.

Cycella optional partner sharing screen
Optional, and always your choice

Bring a partner in, on your terms

Invite a partner with a 6-character code, and choose exactly what they see — mood, when your period's due, and pad status. Your flow, symptoms, notes and doctor report are never shared, even with sharing on. Turn it off any time.

Everything shared is end-to-end encrypted first. See our Privacy Policy.

Why your cycle data stays yours

Period trackers see some of the most sensitive data on your phone. Ours is built so there's less of it to leak or sell in the first place — read what we checked before designing it this way.

No account, ever

Cycella never asks for your name, email or phone number. Your logs live on your phone by default.

You hold the key

Optional backup and partner sharing are encrypted on your phone first. We can't read them, and we don't want to.

No ads, no selling data

There are no ads and no trackers in Cycella. We don't sell or share your data with anyone.

From the blog

All articles ›

Well-researched answers to the questions women ask about periods, cycles and health, citing sources like WHO, ACOG, NHS and NICHD.

Irregular cycles: what's normal, and when to see a doctor

How to tell an ordinary irregular cycle from one that's worth a doctor's visit, and what to track before your appointment.

The fertile window: what it is, and why it isn't a contraception method

How the fertile window is calculated, why it's only an estimate, and why it shouldn't be relied on alone to avoid pregnancy.

First periods: what to expect, and what's normal

What to expect from a first period and the irregular years that follow, plus signs it's worth seeing a doctor.

Be first to know when Cycella launches

We're testing now and launching in Nepal and India this December. No spam, no marketing list — just one note when it's live.

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