Know Her: Period App for Men

Everything at a glance

See her current and next phases directly from your home screen widget.

Two widget sizes. Instant updates.

Your relationship dashboard

See what's happening now and how to support her.

Get personalized guidance for every phase of her cycle.

Mood and energy, day by day

Follow signals that help explain how she may be feeling — from vitality and emotional sensitivity to irritability and physical comfort.

Stay one step ahead

Get the full picture of her calendar and see what's coming next.

Prepare in advance and show up at the right moments.

Just what you need. No more, no less.

⚡

5-second setup

The quickest onboarding.
No account, no forms, no medical information.

Answer 2 questions and you're in.

🏎️

Reliable from day one

Built on 612K cycles and data from 19 million women across the world.

Continuously improves its predictions the more you use it.

🛞

Designed for simplicity

No relationship advice — just clear understanding of your partner.

Know what matters, when it matters.

📝

Personal notes & reminders

Set reminders for anything — now or in the future — in her cycle.

Plans, thoughts, or personal notes brought back to you later.

🔔

Your notifications, your rules

Only relevant updates: phase changes, insights, and your own notes.

Turn them on or off anytime. Full control, always.

🔒

100% private & offline

Nothing leaves your device. No account, no cloud, no sync. Protected with Face ID and biometrics.

Unlike other apps, your data stays only on your phone.

Not just the best — the best value on the market.

Free

All features included. Everything you need to support her.

14 days

Start Free

Daily mood, energy and fertility indicators
Widget for instant updates
Get notified when phases change
Smarter predictions over time
View upcoming phases in advance
Set personal notes and reminders
Fully private, offline and biometric-protected

Monthly

Full access, month to month. Cancel anytime.

$2.99/mo