What health data your iPhone stores and why you might want to delete it

Your iPhone's Health app collects a lot of information about you: steps, heart rate, sleep, workouts, menstrual cycles, medications, medical conditions, emergency contacts, and organ donation status. This data lives in the Health app itself, but it also syncs to iCloud if you have Health sync turned on, and it may be shared with third-party apps like fitness trackers or smartwatches.

You might want to clear some or all of this data for privacy reasons — if you're selling your phone, switching to Android, or straightforward don't want the data sitting on your device anymore. You can delete specific data points (like a single workout), entire categories (like all sleep records), or wipe the Health app completely. Each approach takes a different number of steps, and what you delete doesn't always delete everywhere it's stored.

Before you start deleting, understand that removing data from your iPhone doesn't automatically remove it from iCloud or from apps you've shared it with. If privacy is your main concern, you'll need to handle those separately.

Key Takeaways

  • You can delete individual health records, entire data categories, or reset the Health app completely — each method is found in a different place in Settings.
  • Deleting data from your iPhone does not automatically delete it from iCloud, so turn off Health sync or sign out of iCloud if you want it gone from the cloud.
  • Apps you've shared health data with (like fitness apps or smartwatch apps) keep their own copies — deleting from Health doesn't remove data from those apps.
  • If you're selling your phone, use Erase All Content and Settings rather than just clearing the Health app, because that wipes everything including backups.

Delete individual health records or data types from the Health app

Open the Health app on your iPhone. Tap the Health Data tab at the bottom. Find the category you want to delete from — for example, Steps, Workouts, Sleep, or Medications. Tap the category name.

You'll see a list of individual entries. Swipe left on any entry and tap Delete. If you want to delete an entire category at once, tap Edit in the top right corner, then tap the red minus sign next to the category name, then tap Delete. This removes all records in that category from your iPhone.

This method is useful if you want to keep the Health app but remove specific types of data — for example, deleting all your sleep records but keeping your workout history. It's the slowest approach if you have years of data, because you're deleting category by category.

Turn off Health sync to iCloud

If you've deleted data from your iPhone but it's still backed up to iCloud, turning off sync won't delete what's already there — it just stops new data from uploading. To actually remove health data from iCloud, you need to sign out of iCloud or delete the backup.

To stop syncing going forward: Open Settings, tap your name at the top, tap iCloud, scroll down and tap Health, then turn off the toggle. Your iPhone will stop uploading new health data to iCloud, but old data stays in the cloud.

To delete what's already in iCloud: Go to Settings > [Your Name] > iCloud > Manage Storage > Backups, tap your device name, scroll to Health, and tap Delete Data. This removes the health information from that iCloud backup but keeps the backup itself. Alternatively, you can delete the entire backup by tapping Delete Backup, though that removes everything in the backup, not just health data.

Reset the Health app completely

If you want to wipe all health data at once and start fresh, you can reset the Health app. Open Settings, scroll down and tap Health, then tap Reset Health Data. You'll see a warning that this action cannot be undone. Tap Reset to confirm.

This removes all health records, medical ID information, and emergency contacts from the Health app on your iPhone. It does not affect iCloud backups or data stored in third-party apps. If you've synced to iCloud, the data will still be there until you turn off sync or delete the backup separately.

This is the fastest way to clear everything at once if you don't need any of your health history. It's also useful if the Health app is malfunctioning and you want a clean slate.

Remove health data from third-party apps

If you've shared health data with fitness apps, smartwatch apps, or health tracking services, those apps keep their own copies of the data. Deleting from the Health app doesn't touch them. You need to go into each app and delete the data there separately.

Open each app you've connected to Health — for example, your smartwatch app, fitness tracker, or health insurance app. Look for Settings or Data Management, then find the option to delete your data or disconnect from Health. Some apps let you delete individual records; others let you delete all data at once. The steps vary widely depending on the app.

If you've shared data with a health provider or insurance company through their app, check their privacy policy to understand how long they keep the data after you delete it from your phone. Some providers are required by law to keep records for a set period even after you request deletion.

Use Erase All Content and Settings if you're selling or giving away your phone

If you're selling your iPhone or giving it to someone else, deleting the Health app's data isn't enough — the person who gets the phone could potentially recover deleted data. Use Erase All Content and Settings instead, which wipes everything on the device and removes all backups associated with it.

Go to Settings > General > Transfer or Reset > Erase All Content and Settings. You'll be asked to enter your Apple ID password and confirm. This process takes 5 to 15 minutes and erases all apps, photos, messages, health data, and iCloud backups. It's the only way to may support health data (and everything else) cannot be recovered.

Do this before you hand the phone over. After erasing, the phone will restart and show the setup screen, ready for the new owner to set up with their own Apple ID.

Check what data is still syncing after deletion

After you delete health data, check whether it's still being backed up. Open Settings, tap [Your Name], tap iCloud, and look at the Health toggle. If it's on, new health data is still syncing. If you want to verify what's in your iCloud backup, go to Settings > [Your Name] > iCloud > Manage Storage > Backups, tap your device name, and scroll through the list. Health data size is shown there if it exists in the backup.

You can also check what data third-party apps still have by opening each app and looking at its data or privacy settings. Some apps show you what health information they're storing; others don't make it visible. If an app doesn't show you what data it has, check its privacy policy or contact the company directly.

Frequently Asked Questions

If I delete health data from my iPhone, does it delete from my Apple Watch too?

No. Your Apple Watch syncs health data to your iPhone, but deleting from your iPhone doesn't delete from the watch. You need to erase the watch separately using the Watch app on your iPhone or by resetting the watch itself. Go to the Watch app, tap General > Reset, then tap Erase Apple Watch Content and Settings.

Can I recover health data after I delete it?

If you've deleted it from your iPhone but it's still in an iCloud backup, you can restore from that backup. If you've deleted it from iCloud and from your iPhone, recovery is very difficult unless you have a separate backup file. Once you use Erase All Content and Settings, the data is gone and cannot be recovered.

Does deleting health data from Health app delete it from my fitness tracker or smartwatch app?

No. Fitness trackers and smartwatch apps store their own copies of the data. You must delete the data within each app separately. Disconnecting the app from Health stops new data from syncing but doesn't delete what's already there.

What happens to my medical ID if I reset the Health app?

Your medical ID information is stored in the Health app, so resetting the app deletes it. If you need medical ID information on your lock screen, you'll have to re-enter it after the reset. Medical ID is separate from the Health app data and can be set up again in the Health app or in the Wallet app.

If I turn off iCloud sync for Health, will my data be deleted from iCloud?

No. Turning off the sync toggle stops new data from uploading but leaves existing data in iCloud. To delete health data from iCloud, you must go to Settings > [Your Name] > iCloud > Manage Storage > Backups, select your device, and delete the Health data from the backup.