Emojuju

Emojuju runs completely on your device: your pictures are safe, not sent to any server in [Random Evil Country] .Take a picture that shows people, and Emojuju will make its best effort to place emojis on top of their faces.

When you use other social media apps and cover faces, these apps might still store the original picture where faces are visible. You might want to cover faces first and then share the resulting picture #emojuju.