alternatives

Published by Floriva · Updated 2026-05-01 · How Floriva checks its guides

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.

Cycles by Perigee shares your menstrual cycle data with a partner's device through company servers. Your reproductive health data passes through and is stored on third-party infrastructure by design. Floriva keeps core records on your device and uses optional encrypted sync, not partner sharing through company servers.

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, go to Perigee's servers, and be delivered to someone else's device. This is not a bug. It is how the product is built. 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 may retain access to your cycle data until you manually revoke it. Data already synced to their device may persist locally.

• Account-linked identity. Your email address ties your real identity to your reproductive health data on the company's servers.

The Sharing Paradox

Cycles presents sharing as a feature. From a privacy standpoint, sharing is the risk.

In a post-Dobbs environment, reproductive health data stored on company servers is legally accessible through subpoena. Cycles does not just store your data. It multiplies the copies. Your data exists on your phone, on the company's servers, and on your partner's phone. Three copies, three potential access points, two of which you do not fully control.

The same data that helps a partner understand your cycle also creates a record on their device that persists after the relationship ends. In custody disputes, contentious breakups, or legal proceedings, that data can become evidence. You cannot delete it from someone else's phone.

What Changes When You Switch to On-Device Storage

With a zero-knowledge tracker like Floriva:

• No readable server copy. Core cycle records stay on your phone. If you use sync, Floriva only receives end-to-end encrypted data that we cannot read.

• No account required. No email, no identity link, no way to tie your reproductive health data to your name in a database.

• You control sharing. If you want a partner to know your cycle timing, you can show them your screen or tell them directly. The difference is consent at the moment of sharing, not a standing data pipeline through a company's servers.

• No post-breakup exposure. When sharing is a conversation rather than a server sync, ending the relationship ends the data access.

How to Switch From Cycles

Before leaving Cycles, revoke your partner's sharing access through the app settings. Then check whether the app offers data export, save any cycle history you want to preserve.

Record your last several cycle start dates. Enter those into your new tracker to establish prediction baselines. Most cycle prediction algorithms only need two to three months of historical data to produce useful predictions.

Delete your Cycles account through the app, not just by uninstalling. Uninstalling removes the app but may leave your data on Perigee's servers. For guidance on preserving your history through a switch, see how to rebuild your period history after switching apps.

The Privacy Bottom Line

Cycles solves a real problem, couples want to coordinate around cycle timing. But the solution routes your reproductive health data through company servers and onto another person's device, creating exposure that is architectural, not incidental. Among the best private period trackers, the most protective ones are those where sharing is your choice in the moment, not a standing data pipeline you cannot fully revoke.