Senate minority leader Chuck Schumer has called for an investigation into FaceApp, which alters users’ photos to make them look older or younger.
In a letter posted on Twitter, Mr Schumer called it “deeply troubling” that personal data of US citizens could go to a “hostile foreign power”.
Privacy concerns have been raised about the Russian company which developed the app after it went viral in recent days.
FaceApp has previously denied the allegations.
Wireless Lab, which is based in St. Petersburg, says it does not permanently store images, and does not collect troves of data – only uploading specific photos selected by users for editing.
BIG: Share if you used #FaceApp:
The @FBI & @FTC must look into the national security & privacy risks now
Because millions of Americans have used it
It’s owned by a Russia-based company
And users are required to provide full, irrevocable access to their personal photos & data pic.twitter.com/cejLLwBQcr
— Chuck Schumer (@SenSchumer) July 18, 2019