kalena

Now available on Android

Track your cycle.
Keep it private.

A period and fertility tracker that works fully offline. No account. No data sharing.

Get it on Google Play

iOS coming soon — join the waitlist

Stays on your phone

All your data saved locally on your device. We have no servers or databases.

No subscription

Free to use core features. One-time premium unlock for further insights and BBT tracking.

Built for any cycle

Is your cycle 21 days, 45 days, or doesn't follow a textbook pattern at all? Kalena adapts to you.

Features

See it in action.

A clean, considered interface designed to fade into the background — so you can log a day in seconds and get on with yours.

Insights screen showing cycle length and stats

Track your cycle stats

Calendar screen showing logged periods and predictions

Visual cycle calendar

Smart predictions

The difference

What you get with Kalena.

Most period apps are built around extracting value from you. Kalena isn't.

Most period apps

Kalena

Where your data lives

Their servers

Your phone, only

Pricing model

Subscription, often €60+/year

One-time unlock for premium

Account required

Yes

No account, no email

Tracking & analytics

Multiple third-party SDKs

None

When you uninstall

Data may persist on their servers

Deleted instantly

Privacy by design

We have no servers.

Most period apps say they protect your privacy. We're built differently — we physically cannot see your data because it never reaches us.

No account or email required
Data deleted instantly when you uninstall
No 30-day retention policies
No third-party analytics or advertising SDKs

Read our full privacy policy

iOS

Coming to iPhone soon.

Pop your email below and we'll let you know the moment Kalena is live on the App Store. No spam, no marketing list — just one email when we launch.

Ready when you are.

Free to download. One-time premium unlock. No subscription, ever.