OREANDA-NEWS. March 15, 2016. The world's largest social network said it's acquiring Masquerade, a startup founded last year that overlays silly and cartoonish images, like an Iron Man helmet or a gorilla face, on people's faces as they shoot video. It's quickly become a top mobile app, according to App Annie, a ranking service.

Menlo Park, California-based Facebook said it plans to let the Belarus-based Masquerade, or MSQRD, remain a standalone and free app. The purchase adds to Facebook's list of creative tools, which includes stickers, text on photos and finger doodles.

A Facebook spokeswoman said Masquerade had "world-class imaging technology for video." She added Facebook would continue to enhance its video experience.

Masquerade's effects are similar to Facebook rival Snapchat's filters, which have become such a hit that Snapchat started charging for some of them last year. Snapchat last month launched a popular face-swap filter as part of its larger Lenses tool.