If you take a photo of your friends, family, colleagues etc by this app, their faces will be masked in the photo. Tap "Start" to take a photo or "Album" to choose a photo from your Photo Album. Then tap "Mask" button. If the photo include some human faces, they will be masked. One face will be covered by one of the 8 types of masks. So it would be exciting to look into the photo with the feeling of which mask you are wearing in it.