You could have dozens of copies of the same images in your Photos library, taking up space on your phone and in your iCloud account. Luckily, Apple offers an easy-to-use little tool that lets you find duplicate photos and delete the copies, all right from the Photos app.
These types of duplicate images can accumulate more quickly than you might expect. They arise if you make a copy of a photo to edit, if you screenshot a photo to bump it to the top of your Camera Roll, or if you save the same image out of Messages twice by accident. In fact, I found a bunch of duplicates in my own carefully curated library.
It’s a surprisingly sophisticated feature that took Apple engineers a fair amount of smarts to cook up (more on that later). Here’s how to use Apple’s duplicate image remover and get rid of all those unnecessary files.