How to share your cycle with a partner (safely)

Sharing your cycle can make a relationship easier: a partner who knows your period is due, or that the week before is hard, can plan around it and be kinder. It works best when you choose exactly what they see, can stop at any time, and the app cannot read what you share.

What is worth sharing with a partner?

• Period dates and phase: the most useful and least personal.
• Mood or energy: helpful if PMS or PMDD affects you.
• Fertile window: useful when trying to conceive together.
• Keep private: anything you would not say out loud, such as notes, sex logs or test results.

Which apps let you share your cycle with a partner?

How do you share safely?

1. Start small: period dates only, then add more if it helps.
2. Talk about why you are sharing and what each of you expects.
3. Use an app where you can pause or revoke sharing instantly.
4. Check who else can see it: shared calendars and notifications can reveal more than you meant.
5. Review it every few months. Consent can change.

How partner sharing works in Splash

Your partner scans a QR code on your phone. The code holds a secret key that never reaches our server (see how partner sharing works), so only their phone can decrypt what you share. You tick the categories they see, and can pause, set an end date or revoke in one tap. They need a free account so their app can fetch your encrypted updates.