When Doublexposure Pro stopped working after the iOS 8 update I looked for a suitable replacement . . . eventually I found Image Blender . . . Its simple . . . no BS . . . you pick the images, adjust transparency and yer done . . . oh, and you can mask out unwanted areas . . . I havent tried the mask feature, but . . . its worth the $2.99 just to be able to overlay images . . . GET IT!!