This app is more like smoke and mirrors. It includes a library of pictures, then puts the picture that you choose in tonPictures on your iPhone. You sync that folder to your watch. All you get next is new photos to add to the existing photos watch face option already offered by Apple. You dont actually get NEW watch faces. Just new pictures with a neat way to add them. Not worth the money as anyone can create a new folder in Pictures and sync it.
Richie_Redbull about iFaces - Custom Themes and Faces for Apple Watch, v1.3