Your cycle,
synced with
the moon.
Athena tells you where you are in your cycle and what's coming — privately, on your phone, forever. No account, no cloud sync — your cycle data never leaves your device.
The period tracker that can't sell your data.
Not “won't.” Can't. Your cycle data lives only on your phone — no account, and nothing for us to hand over.
Your data lives on this phone. No account, and no server holds your cycle data — so there's nothing to subpoena. We couldn't share it if we wanted to.
Predictions that admit uncertainty, patterns learned on-device, science that shows its work.
Free features stay free forever. Export everything, any time. Leave whenever you want — with your data.
Privacy you can check, not just trust.
No account, ever
No email, no password, no sign-up wall. Just open it and go.
Works fully offline
No connection needed. Airplane mode changes nothing.
App lock & decoy PIN
Face ID or a PIN — and a second PIN that opens a decoy.
Panic wipe
Clear everything in a moment when you need to — no trace left.
Discreet mode
A neutral name, icon and notifications — nothing gives it away.
Export & leave anytime
Take your full history with you whenever you like. It's yours.
Read the full privacy policy — it's short, because your cycle data never reaches us.
Where you are, at a glance.
A cycle that reads like the night sky — your day, your phase, what's next.
Honest predictions.
Honest predictions. Ranges when your cycles vary — never fake precision.
Patterns, learned on your phone.
Patterns learned on your device. BBT, symptoms, cycle history — yours alone.
Beautiful on iPad, too.