PhoTop is a photo utility app. It could help you in below ways: 1, Quickly check image size. Browse all images and see the size of each image just below the thumbnail. Different colors indicate different sizes, for example: images larger than 5M are marked in red. 2, Quickly find out large images. You can choose to show only high resolution images(for example: >4000x3000). This is easier for you to find large images quickly. 3, Play animated GIF. 4, Check Live Photo's Size A Live Photo is composed of 2 parts: an image, and a video. PhoTop shows you both the image size and the video size, so that you will have a better idea how your storage is used.