This viral photo app that makes you look old has been all over everyone's social-media feeds. Here's how to use it.

• FaceApp, the photo-editing app that uses artificial intelligence to apply filters, has seen a resurgence of interest in recent days.
• People have been using the app's "Old" filter to share photos of what they might look like after aging on social media.
• Celebrities such as the rapper Drake and the pop group the Jonas Brothers have been using the app, too.
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If you've been seeing your Facebook, Instagram, and Twitter feeds filled with photos of friends and family members that seemingly aged overnight, you're not alone.

In recent days, there's been a resurgence of interest in FaceApp, the popular photo app that uses artificial intelligence to apply filters that can make you look older or younger, or swap your gender, in addition to other effects. The app launched in 2017, but it has been flooding social-media feeds everywhere over the past several days. Celebrities from the rapper Drake to the famous chef Gordon Ramsay and the pop group the Jonas Brothers have been using the app to see how they might age. 

But there are a few things you should keep in mind before you start uploading your photos. The app's terms give FaceApp, which is based in Russia, the freedom to use user content however the company wishes. There has also been some concern over how the app accesses a user's photo library even if that person doesn't give the app permission to do so. But TechCrunch reported that Apple offers a tool developers can build into their apps that lets users choose one photo from their library to upload without giving that app access to the entire library. 

If you do want to try using FaceApp to see how you'll age, you can do so by following the steps below. 

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Download the FaceApp app from the App Store or Google Play and decline the offer to subscribe to the app when opening it.

Take a photo of yourself or choose a photo from your image library. Tapping the "Photos" button at the bottom will let you choose a photo from your camera roll without giving the app access to your entire photo library.

Scroll over to the "Age" filter at the bottom of the screen.

Choose "Old" and wait for the photo to process.

You can also use demo photos provided by the app or choose images of celebrities by tapping the button near the bottom of the app.

Celebrities have been taking part in the #AgeChallenge too, including the actress Busy Philipps.

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And the comedian Sarah Silverman.

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And Drake.

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• Read more:
• Viral app that makes you look old with shocking precision may be quietly keeping all your data
• Everyone from Drake to the Jonas Brothers is posting photos where they look old — these are the best ones
• The DNC reportedly sent out an alert to 2020 campaigns telling them to delete the viral aging app FaceApp over Russia concerns
• Top Democrat urges FBI and FTC to investigate FaceApp over its Russia ties