alternatives

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

Femometer App Alternative: Private Period Trackers That Keep Data on Your Device

Looking for a Femometer app alternative? Femometer syncs your BBT and cycle data to servers outside US jurisdiction. Here's what that means and which trackers keep data on your device instead.

Femometer syncs your cycle and BBT data to servers operated by Bongmi Technology, a company based in China. Your reproductive health data is stored outside US jurisdiction, beyond the reach of US privacy regulations. Floriva keeps core records on your device and offers optional encrypted sync.

Why Users Are Leaving Femometer

Femometer markets itself as a fertility companion, pairing a Bluetooth BBT thermometer with an app that charts temperature, cervical mucus, and LH test results. The hardware is competent. The privacy architecture is the problem.

Femometer is developed by Bongmi Technology, headquartered in Shenzhen, China. When you sync your thermometer or log a cycle, that data travels to company servers outside US jurisdiction. US state health data privacy laws, including those passed specifically to protect reproductive health information after Dobbs, do not apply to data stored on servers in China.

What Femometer Does With Your Data

Femometer requires account creation with an email address. From your first login, your identity is linked to your reproductive health data on Bongmi's servers.

The app collects BBT readings, menstrual cycle dates, ovulation predictions, LH test results, and any symptoms or notes you enter. All of this is synced to company infrastructure as part of normal operation. It is not optional.

Femometer's privacy policy grants the company broad rights to use collected data. Because the company operates under Chinese data protection law rather than US regulations, the legal framework governing your reproductive health data is fundamentally different from what most US users expect. There is no HIPAA protection. There are no state reproductive health data shield laws.

This is not a hypothetical concern. This is a documented pattern across period tracking apps. The difference is that Femometer places your data in a jurisdiction where US legal protections do not follow.

The Jurisdiction Problem

Data jurisdiction matters for period tracking in ways it does not for most apps. In a post-Dobbs environment, reproductive health data has become legally sensitive in multiple US states. Some states have passed shield laws specifically protecting this data from out-of-state subpoenas.

Those shield laws protect data held by companies within their reach. They cannot protect data stored on servers operated by a company in Shenzhen. The data is simultaneously outside the protection of US privacy laws and outside your practical ability to enforce deletion.

On-device storage reduces the jurisdiction question. Core records stay on your phone. If you use optional sync, only end-to-end encrypted data leaves the device.

What Changes When You Switch to On-Device Storage

With a zero-knowledge tracker like Floriva:

• No readable cloud record. Your BBT data, cycle dates, and symptoms stay on your phone for core tracking. Optional sync sends only end-to-end encrypted data.

• No account required. No email, no identity link, no way to tie your health data to your real name.

• No jurisdiction risk. Your data is governed by one jurisdiction: your physical possession of your own device.

• Less dependency on company privacy policies. Policies can change. Architecture matters because Floriva cannot read synced ciphertext.

Floriva supports daily logging and pattern review for users who want cycle notes without a readable cloud record. Check current app onboarding before you rely on a specific BBT field.

How to Switch From Femometer

Before leaving Femometer, check whether the app offers a data export option in its settings. If available, export your data and save it locally. Record your recent cycle start dates and any BBT baselines you want to preserve.

Enter your last several cycle start dates into your new tracker. BBT data is most useful as an ongoing record, so starting fresh with consistent daily readings in your new app will produce reliable charts within one to two cycles.

If you used Femometer's hardware thermometer, the thermometer itself will continue to work for manual readings. You will lose the automatic Bluetooth sync, but you can enter BBT readings manually into any tracker that supports temperature logging.

After switching, delete your Femometer account through the app's settings, do not just uninstall. Uninstalling removes the app from your phone but leaves your data on Bongmi's servers.

The Privacy Bottom Line

Femometer's hardware integration is genuine. But the privacy trade-off is steep: your most intimate health data is sent to servers outside US jurisdiction, tied to your email address, and governed by a different country's legal framework. Among the best private period trackers, the ones that eliminate this trade-off are those that never send your data anywhere at all.