How to Delete Your Smartwatch Data and Account Before Selling

Why wiping your smartwatch matters before you sell

A smartwatch is a personal device. It holds your health metrics, workout routes, messages, contacts, and sometimes payment cards or door passcodes. When you sell, trade, or hand down your watch, all of that can remain on the device unless you remove it. A factory reset is the standard way to erase on-device data, but it doesn't always remove your account from the watch or delete data that has already synced to the cloud.

Each platform handles this a little differently. On watchOS, unpairing the watch and erasing it removes Activation Lock, which stops a new owner from being locked out by your Apple Account. On Wear OS by Google and other platforms, a factory reset clears local data, but your account may still be associated with the device until you remove it in the companion app. The order matters: unlink first, then reset, then remove the cloud data you no longer need.

Back up what you want to keep before you erase

Before you reset anything, decide whether you want to keep any of the data on the watch. Health history, workout logs, and photos might be useful to you later, even after the watch is gone. The easiest way to keep that data is to let it live in the cloud: most smartwatch platforms sync health and activity data to their companion app on your phone, and then optionally to a web-based dashboard.

If you want a portable copy that isn't tied to any platform, use the export feature in the companion app or its web portal. Some platforms let you export your health data in a standard format, which you can store on a computer or import into a different health app. Do this before you unlink the watch: once the watch is removed from the account, some platforms make it harder to access its data. We cover data ownership and export options in more depth in our article on smartwatch data ownership and export.

Unpair the watch and reset it to factory settings

The first step after backing up is to unpair the watch from your phone. Unpairing removes the connection and typically triggers a backup of the watch's settings to the phone, which you don't need if you've already saved what matters. More importantly, unpairing on most platforms also removes activation locks and unlinks the watch from your account.

After unpairing, or instead of it, you can reset the watch directly from the device. On watchOS, you go to Settings, then General, then Reset, and choose Erase All Content and Settings. On Wear OS, you find the reset option under System in the Settings app, or you can reset from the companion app on your phone. On Garmin devices, the reset option is under System, then Reset; you can choose to delete data and reset settings. On fitness bands and budget watches, the reset option might be called "Restore Factory Settings" or "Factory Reset." If you can't find it, check the manual or the companion app.

A factory reset clears on-device data like your watch faces, apps, stored music, and personal settings. It also removes any payment cards you added to the watch. If you use contactless payments on your watch, make sure you remove the cards before resetting, or at least verify afterward that they are no longer active on the watch. For more on how payment cards work on watches and what happens when you lose or reset a device, see our article on smartwatch payment safety.

Remove the watch from your account and the cloud

A factory reset alone is not always enough. If the watch stays linked to your account, the next owner could see your data in some cases, or the watch could remain locked if your account has an activation or anti-theft feature. You should remove the watch from your account in the companion app or on the platform's web portal.

On Apple Watch, unpairing the watch from the Watch app on your iPhone removes it from your Apple Account and disables Activation Lock. If you sell the watch without unpairing, the new owner will be prompted for your Apple Account password. On Wear OS watches, open the companion app on your phone, find the connected watch, and choose to remove or forget it. The exact location varies by brand, but it's usually under a device or settings menu.

After you remove the watch, check the cloud side. Health and fitness data already synced to your account stays there even after a reset. If you don't want the next owner to access it (and they shouldn't be able to, since it's behind your login), leave it. But if you want to delete it, use the export or delete feature in the platform's web dashboard. For children's watches, the parent account controls the data, and the FTC notes that parents have the right to review and have their child's information deleted; this applies to smartwatch data too. See the FTC's guidance on children's privacy for more context.

Special cases: kids' watches and family setup

If you're selling a smartwatch that was set up for a child, the process is similar but the account is the parent's. Unpair the watch from the parent's phone, then remove the child's profile from the watch. For Apple Watch with Family Setup, you remove the watch from the parent's iPhone by unpairing it. For kids' watches from other brands, you typically remove the watch from the parent account in the companion app, which also cancels the watch's access to approved contacts and location sharing.

Before you hand down a kids' watch, make sure the child's location history and contact list are deleted. These are exactly the type of personal details that COPPA gives parents control over, and you should treat them as sensitive even if the new owner is a relative. Check the watch's storage settings to confirm the reset removed all profiles. For more on what to check when buying used, see our guide on buying a used smartwatch checklist and the piece on account locks on used watches.

Prepare the watch for the next owner

Once the reset is complete and the watch is unlinked, give the watch a final check. Turn it on and confirm it boots to the setup or pairing screen, not to your watch face. If it asks for a passcode or an account password, the reset didn't fully remove the account, and you need to unpair or remove the watch from your account again.

Clean the watch and the band before packing it. If you included extra bands, check that no personal data is stored on a band with sensors, though most bands have none. If the watch has a SIM or eSIM for cellular, contact your carrier to deactivate the plan, or at least confirm that the watch's cellular plan is disabled. A watch with an active line could still receive calls or use data under your plan, which the new owner might not expect. For more on how cellular plans work, see our article on smartwatch cellular plans.

What to pick depending on your situation

Questions

Will a factory reset remove my account from the watch?

Not always. On Apple Watch, unpairing removes the Activation Lock, but a reset alone may leave the watch tied to your Apple Account. On Wear OS, a factory reset clears local data, but the watch may still appear in your companion app account. Always unlink the watch from your account after resetting.

How do I delete health data stored in the cloud?

Open the companion app or the platform's web dashboard and look for export or delete options. Some platforms let you delete health records individually, while others require contacting support. Export any data you want to keep before deleting, because deletion is usually permanent.

What should I do about payment cards on my watch?

Remove them before you reset the watch. On Apple Watch, open the Wallet app and remove cards. On Wear OS, open the payment app and remove cards. After a factory reset, cards should be gone, but confirm in the payment app that no card is still active.

What happens if I forget to unpair my Apple Watch before selling it?

The new owner will be asked for your Apple Account password when they try to pair it. You can either have them contact you to enter the password, or you can remove the watch remotely from your Apple Account dashboard. The easiest path is to unpair before selling.

Do children's smartwatches store data differently?

Yes. For kids' watches, the parent account controls the data, and the child's profile is often tied to the parent's app. Removing the watch from the parent account is essential to clear contacts, location history, and approved numbers. The FTC notes that parents can have their child's data deleted, which applies to smartwatch data.