"With My Twin" allows you to appear twice in a photo.
-Place your Apple device
-Specify the photo transition area by tapping on the screen.
-Tap the button "Begin Taking Photos"
-It will take two photos repeatedly.
-The app waits for 5 seconds before taking each photo and red frame shows the active area.
-It combines the two photos.
-You can share the result via Facebook and save the image.