LiveLockWP

You can create "Live Wallpaper for Live Photo" with your favorite image.

You do not need to take a "image for Live Photo" to create the Lock screen wallpaper. 

Because ,this app is able to create "Live Wallpaper" from the following images.
1) The Normal photo you taken.
2) The downloaded images from web site.
3) The images that saved  in camera roll.

By only few step, You can create it.
The operation to create your own favorite Lock Screen wallpaper, is very easily.

1) Selecting 2 Photo.
2) Choosing the spee of changing image.
3) Confirming the saving image.
4) Tapping save button.

-Note-
For iPad, please note the following
(1) It is possible to create live photos.
(2) After setting a live wallpaper, it is not possible to make it work by holding down the lock screen.
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We recommend that you use the application on iPhone."