Is my period tracker private? How to choose a safe one
A period tracker is only as private as its design. The safest period tracker apps keep your cycle data on your device, don't require an account, don't send health events to advertising or analytics tools, and let you delete everything easily. Check the App Store privacy label, the privacy policy, and whether the company stores your data on its servers.
6 checks for a private period tracker
| Check | Safer answer | Where to look |
|---|---|---|
| Where is cycle data stored? | On your device | Privacy policy, FAQ |
| Do you need an account? | No, or optional | Sign-up screen |
| Is data linked to you or used to track you? | As little as possible, ideally nothing health-related | App Store privacy label |
| Are third-party ad or analytics kits used? | None that receive health events | Privacy policy, label |
| Can you delete everything? | Yes, in the app, without emailing anyone | Settings |
| Any enforcement history? | None, or fixed with clear changes | Search the app with "FTC" |
Why these checks matter
The main privacy problems with period apps haven't come from hackers. They've come from data the app itself sent out. In 2021 the FTC said Flo shared health information with analytics divisions of Facebook and Google; in 2023 it said the ovulation app Premom shared sensitive data with third parties including advertisers. Read more in do period apps share data.
Data on a company's servers also carries other risks: breaches, changes of ownership, and legal requests. Data that never leaves your phone avoids those by design.
Settings that make any tracker more private
- Use a passcode and Face ID or Touch ID on your phone.
- Turn off ad personalization and "Allow apps to request to track" in your phone's privacy settings.
- Skip optional fields you don't need, like notes about sex or pregnancy tests.
- Review which apps can read your Apple Health data.
- Export and delete data from apps you no longer use.
How Lulu is built
Lulu was designed so we never receive your cycle data. Periods, moods, symptoms and notes are stored on your iPhone. There's no Lulu account and no Lulu server that holds cycle data. Partner sync is optional and shares only a small status through Apple's iCloud (name, cycle day, phase and next period, plus today's mood, tomorrow's forecast and fertile window only if you turn them on), never your symptoms, notes or history. Compare approaches in private period tracker and period tracker with no ads.
Want your history for a doctor? Lulu exports a CSV that you choose where to send.
Frequently asked questions
What is the most private way to track my period?
An app that stores data only on your device, with no account, or a paper diary. Our period tracker printable is fully offline.
Do period trackers need an account?
Many do, which usually means your data is stored on their servers. Some, including Lulu, work without one.
Can my period data be used against me?
Any data held by a company can, in principle, be requested through legal process. Keeping it only on your device reduces that risk.
Is the Apple Health Cycle Tracking app private?
Apple says that with two-factor authentication on, Cycle Tracking data synced to iCloud is encrypted so that Apple itself can't read it. See Lulu vs Apple cycle tracking.
Sources
- FTC: FTC Finalizes Order with Flo Health (2021)
- FTC: Ovulation Tracking App Premom Will be Barred from Sharing Health Data for Advertising (2023)
- Apple Support: Track your period with Cycle Tracking
This page is for information only and isn’t medical advice. If something worries you, please talk to a doctor.
Keep reading
Do period apps share your data?Do period apps share your data? Some have: the FTC acted against Flo and Premom. How data gets shared, what to check before you log, and how Lulu works.Period trackers that don't share your data: how to choose a private oneWant a period tracker without data sharing? How period apps handle your data, what went wrong at Flo, Maya and Stardust, and how to check any app yourself.
Period tracker with no ads: your options, comparedTired of pop-ups in your period tracker? Period tracker no ads options compared: what's free, what's paid, and what ad-free does and doesn't mean for privacy.Apple Health Cycle Tracking vs Lulu: is the free app enough?Apple Health cycle tracking is free and built in. What it does well, what it skips (mood forecasts, a partner view), and how Lulu compares side by side.
Printable period tracker: a simple layout you can copyA free printable period tracker layout: what columns to include, how to fill it in, and how to read your chart after three months. Print this page or copy it.