Facebook removed Onavo—a free VPN run by the social networking company—from the iOS App Store today. The voluntary move by Facebook was prompted by discussions with Apple about privacy policy.

Onavo promises to help “secure your personal details” on the product’s website, but the VPN service exists primarily so Facebook can monitor user activity on rival sites. In other words, Facebook uses it to spy on you.

Onavo is installed on around 33 million devices.

RELATED: Facebook Removed Their Spying VPN From The App Store (But It’s Still on Google Play)

As of this writing, Onavo is no longer available for new downloads on the App Store, but existing users still have the current version on their devices. We suggest uninstalling it now.

Here’s a statement from Apple about the removal, via Juli Clover at MacRumors:

With the latest update to our guidelines, we made it explicitly clear that apps should not collect information aout which other apps are installed on a user’s device for the purposes of analytics or advertising/marketing and must make it clear what user data will be collected and how it will be used.

Onavo remains available on Android’s Google Play store, but we suggest anyone using it uninstall now and find a VPN that respects your privacy. Yes: that will probably mean paying for it, but any VPN worth using is going to cost money—at least, it will if privacy is what you’re after.

Photo credit: Antonio Guillem/Shutterstock.com