Two kinds of “duplicate”
When people want to delete duplicate photos, they usually mean one of two different things:
- Copies: the same photo saved twice, say from an import, a restore or an AirDrop that happened twice.
- Near-duplicates: five photos of the same birthday cake because you weren’t sure which one was in focus. Not the same photo, just the same moment.
The iPhone only automates the first kind.
Copies: the Photos app’s Duplicates album
Since iOS 16, the Photos app detects duplicate photos and videos in your library and collects them in the Duplicates album.
- Open Photos and tap Collections.
- Scroll down to Utilities, then tap Duplicates.
- Tap Merge on a set, then tap Merge [number] Items to confirm. To merge several sets or all of them, tap Select first.
Merging keeps one photo, combining the highest image quality and the relevant data, and moves the other copies to Recently Deleted. In Apple’s words, you merge duplicates “to save space and clean up your library.”
If there’s no Duplicates album, either your iPhone hasn’t found any duplicates or it’s still indexing. Detection needs the iPhone locked and connected to power, and depending on the size of your library it can take anywhere from moments to a few days, so leaving it charging overnight helps.
It’s a good first pass, and it’s free: it’s part of the Photos app. If your library went through repeated imports, restores or AirDrops, this is usually where the obvious duplicates are.
Near-duplicates: this needs you
This is the part no app, deja included, does for you. A burst of five photos from the same second isn’t a set of copies; they’re five different photos. Deciding which one to keep — sharper focus, a better smile, nobody blinking — takes a person looking at them.
deja makes that easy instead. It plays your photos full screen, one at a time, in the order you took them, so a burst or a series of retakes comes one after another as you go through a day. Instead of hunting across a grid of 20,000 thumbnails, you see them where they happened and compare them directly. ♥ the one you love, mark the rest with the trash, and keep going. Nothing is deleted until the end of the day, when you confirm the whole batch at once in iOS’s own dialog.
A practical way to combine both:
- Check the Duplicates album once to merge the copies for free.
- Then relive your camera roll a day or a week at a time in deja for the bursts, retakes and near-duplicates the Duplicates album doesn’t collect.
Why deja leaves the choice to you
deja doesn’t try to guess which photo in a burst is “best”, on purpose. Judging focus, expressions and framing across five nearly identical shots is exactly the call that goes wrong when it’s automated: a sharpness score will happily keep the crisp photo where everyone’s eyes are closed. Putting the photos in front of you, in the order and context they were taken, is a choice, not a missing feature.
After you delete
Whether you merge in the Duplicates album or delete with deja, nothing is gone right away: the photos go to Recently Deleted, where iOS keeps them for 30 days before removing them for good. That’s your safety net if you change your mind.
Which to use when
- You restored a backup or imported the same photos twice → the Duplicates album. Free and built in, one tap per set.
- You have years of bursts, retakes and “just in case” shots → relive them a day at a time in deja, where the day’s context makes each decision easy.
- Both → start with the Duplicates album, then use deja for what it doesn’t collect. More in deja vs the Photos app.
