How to delete your period tracker data (Flo, Clue, Apple Health, Stardust)

Switching period trackers is the easy part. Getting the old one to forget you completely is the hard part.

Below: the exact steps for the four most-installed cycle apps, the friction each one introduces, and what "deleted" actually means under their policies. Do this BEFORE you uninstall the app — once it's gone, the in-app deletion flow goes with it, and you'll have to go through email support.

Apple Health Cycle Tracking

The easiest one. Health data is on-device + iCloud, fully under your control. To delete:

1. Open the Health app.
2. Tap your profile picture (top right).
3. Scroll to Privacy → Apps and Services.
4. Find the apps that had cycle access; toggle off, or delete.
5. For Apple's own data: Browse → Cycle Tracking → entry → Delete for individual entries, or Settings → General → Transfer or Reset iPhone → Erase All Content for everything (nuclear).

What "deleted" means here: Gone from device + iCloud, immediately. Apple has stated they cannot decrypt cycle data, so there's no copy on Apple's side to delete separately.

Flo

Harder. Flo holds cycle data on its servers tied to your account. The "delete my account" flow is buried.

1. Open Flo and tap You (bottom right).
2. Tap the settings gear icon (top right).
3. Scroll to Personal Data.
4. Tap Delete my account.
5. Confirm the deletion. You'll be asked for a reason — you don't have to give one.

Dark pattern alert: Flo will offer to "pause" your account instead of delete. Pause means the data stays. Pick delete, not pause.

What "deleted" means here: Flo's privacy policy commits to deletion within 30 days of request, but does NOT commit to deletion from backup snapshots or from data already shared with third parties before deletion. Worth keeping in mind: this is the company that was fined by the FTC for sharing menstrual data with Facebook in 2021. The horse has bolted; closing the stable now helps but isn't a time machine.

Clue

Comparatively clean process. Clue is GDPR-bound and has to honor deletion.

1. Open Clue and tap the menu icon (top left).
2. Tap Settings → Account.
3. Tap Delete account.
4. Confirm. You'll get an email confirmation within minutes.

What "deleted" means here: Per Clue's privacy policy, your account and personal cycle data are deleted within 30 days. Aggregated, anonymized data already used in research studies (Stanford, Oxford, etc.) is not pulled back — it's already been stripped of identifiers and isn't tied to you anymore. That's a legitimate research-ethics norm and we'd call it acceptable.

Stardust

Less transparent. The in-app deletion exists but the surface area is small.

1. Open Stardust and tap the profile icon.
2. Tap Settings.
3. Scroll to Account → Delete account.
4. Confirm.

Dark pattern alert: If you can't find the option in-app, you may have to email [email protected] and request deletion in writing. Make the request unambiguous: "Please delete all data associated with my account, including any data shared with third parties prior to this date."

What "deleted" means here: Stardust has been called out previously for sending data to third parties despite marketing privacy (The Markup, 2022). Any data already shared is, by their own admission, beyond their control to recall. Deletion stops the flow forward, not backward.

The deeper problem with cloud-stored cycle data

"Deletion" is always a one-way request to a server that may or may not honor it completely. You're trusting:

• The company to actually run the delete query.
• The company's backups to be re-run such that your data ages out.
• Every third party they shared with to also delete.
• Every analytics provider, ad network, and partner to also delete.

That's a long chain of trust. Most of it isn't enforceable from your end.

The only architecture where "delete" is guaranteed to mean "gone" is one where the data was never on a server in the first place. That's why the safest trackers are the offline-first ones: there's no other party in the chain to delete from.

After you delete

Some optional follow-up steps that close the remaining loops:

• Revoke any "Sign in with Apple" / Google grants the app had. Settings → Apple ID → Sign-in with Apple, find the app, revoke.
• Check connected services. If the period app was connected to Apple Health, the sync stops on deletion but the imported data may remain in Health. Delete it there too.
• Remove the app from your phone after the deletion confirmation email arrives — not before.
• Email-verify the deletion. Most companies send a final confirmation. Save that email — it's your evidence the request was processed.

And then, if you want a tracker where this whole process never has to happen again, see the best private period tracker apps in 2026.