the thing about the legal aspect is that if the person who uploads the image doesnt own the image then faceapp cant obtain rights over the image. One good example is the fact that youtuber captain sparkles has had faceapp pictures made of him by his fans and posted on his subreddit however no one with legal rights to the picture has uploaded it meaning if faceapp uses it he could sue.
just as a basic rule remember that no contract signed can break the law without being rendered void.
just as a basic rule remember that no contract signed can break the law without being rendered void.