Snapchat personnal face lenses

«As part of the creation, you have to enter a time and place for the Lens to be active, meaning it’s best suited for events with set dates. After that, they disappear. Also, they aren’t free. Snapchat prices custom Lenses based on location size and duration, with the minimum payment being $9.99».

Source : Snapchat now lets users create their own face Lenses