Crop Wallpaper is a screenshot tool that can easily capture pictures of the required size for you and use them as wallpapers.
Crop Image
You can import local pictures or network pictures for cropping, and then crop the picture at any position, and you can choose the desired size to crop. You can save screenshots to the system "Pictures" directory, and view all stored screenshots in "My Wallpaper".
Image Description
Size
There are 54 built-in sizes, including all sizes of iPhone/iPad/AppleWatch launched after 2016. You can customize the size.