Now available on Android

Know your
flow.

The period tracker that stays on your phone.
No cloud. No subscription. No data sharing. Ever.

Get it on Google Play

iOS coming soon

No cloud storage

Pay once, keep forever

No ads

No servers

GDPR compliant

Data deleted instantly on uninstall

Why Kalena

Built different.

Zero cloud storage

Every period, symptom, and note stays on your device. We have no servers to breach, no database to hand over, no account to hack.

One-time purchase

Pay once, keep forever. No $60/year subscription. No features disappearing behind a new paywall. Yours for life.

Works for your cycle

Whether your cycle is 21 days or 45, Kalena adapts to you — not a textbook 28-day average.

Features

See it in action.

Track your cycle stats

Visual cycle calendar

Smart predictions

Dark Mode

Light or dark,
your choice.

Kalena follows your system theme automatically. Looks great day or night — no extra settings, no hunting through menus.

Follows system theme automatically
Full-colour calendar in both modes
Easy on your eyes at night

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. Law enforcement subpoenas to Kalena would return nothing. There is nothing to return.

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 →

Ready to know your flow?

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