Does Cycles share my period data with my partner

Yes, that is the app's core feature. Cycles transmits your menstrual cycle dates, fertility window predictions, and symptoms to your partner's device through Perigee's servers. This means your reproductive health data is stored on company infrastructure and accessible from another person's phone.

Can my partner still see my data after we break up

You need to manually revoke sharing access through the app. Until you do, a former partner may retain access to your cycle data. Any data already synced to their device may persist locally on their phone even after you revoke server-side access.

Is Cycles safe to use for period tracking

Cycles functions as a period tracker, but its partner-sharing feature means your cycle data is necessarily stored on company servers and transmitted to another device. This cloud-based architecture means your data can be subpoenaed from the company's servers.

alternatives

Cycles Period Tracker Alternative: Private Period Trackers That Keep Data on Your Device

Looking for a Cycles period tracker alternative? Cycles shares your cycle data with a partner via company servers. Here's the privacy cost of couple-sharing and which trackers keep data on your device.

Why Users Are Leaving Cycles Cycles by Perigee is a period tracker built around one feature: sharing your cycle data with a partner. Couples use it to coordinate around fertility windows, period timing, and symptoms. The interface is clean. The privacy model is the opposite. For partner sharing to work, your cycle data must leave your phone, travel to Perigee's servers, and then be delivered to someone else's device. This is not a bug — it is the product's architecture. Every cycle date, every fertility prediction, every logged symptom passes through company infrastructure. What Cycles Does With Your Data Cycles requires account creation. Your cycle data is stored on Perigee's servers as part of normal operation. The partner sharing feature means your reproductive health data is not just cloud stored — it is actively distributed to another device. This creates multiple exposure points that do not exist with on device trackers: Server side storage. Your data exists on Perigee's infrastructure and can be subpoenaed by law enforcement. Partner device copy. Your cycle data lives on another person's phone, outside your control. Relationship changes. After a breakup, your former partner