FaceApp old filters have suddenly gone viral again, with Android and iOS fans using the age filters to see what they look like when they’re older.

Twitter and other social networks are being flooded with FaceApp old age filter snaps while the app has become the App Store’s top trending download.

FaceApp can be downloaded and used for free for three days from the Google Play Store or the Apple App store.

Click here to download FaceApp Android or alternatively clicking here will let iOS users download FaceApp from the App Store.

However, before you download FaceApp there’s one important thing that Android and iOS fans need to be aware of.

As reported on in a post by USA Today, the FaceApp privacy policy says it collects pictures you upload to the service.

It says it it collects user content like “photos and other materials that you post through” FaceApp.

While developer Joshua Nozzi shared something on Twitter that he claimed he noticed after using FaceApp for the first time.

He tweeted: “BE CAREFUL WITH FACEAPP – the face aging fad app. It immediately uploads your photos without asking, whether you chose one or not.

“As soon as I granted access to my photos it started listing them slowly a row at a time, almost like network delays.

“I quickly hit Airplane Mode and it instantly listed them all, refusing to let me select any because I’m offline. IT’S UPLOADING ALL YOUR PHOTOS.”

However, Guardian App CEO Will Strafach and researcher Baptiste Robert did not find any evidence of FaceApp uploading a user’s full camera roll.

Strafach tweeted: “Using a network traffic analyzer, I tried to replicate the thing people are talking about with FaceApp allegedly uploading your full camera roll to remote servers, but I did not see the reported activity occur.”

Express.co.uk has contacted FaceApp for comment and asked for clarification about what type of pictures it collects.

In its privacy policy FaceApp says: “We collect the following types of information.

“Information you provide us directly: User Content (e.g., photos and other materials) that you post through the Service.

“Communications between you and FaceApp.

“For example, we may send you Service-related emails (e.g., changes/updates to features of the Service, technical and security notices).

“Note that you may not opt out of Service-related e-mails.”

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