If your iPhone's storage bar is creeping toward full, duplicate photos are one of the easiest things to reclaim — and you don't need to install anything to start. Every recent iPhone, whether you're on an iPhone 15, 16, or 17, ships with a built-in Duplicates album that finds exact copies and merges them in a couple of taps.
This guide walks through that built-in tool step by step, explains exactly what the Merge button keeps and discards, covers the cases the built-in tool misses (there are important ones), and shows how to finish the job with a similar-photo cleanup — including, with full disclosure, how our own app handles it.
Quick answer: Open Photos > Albums, scroll to Utilities, and tap Duplicates. Tap Merge on each pair, or Select All > Merge to clear everything at once. iOS keeps the highest-quality copy and combines the metadata. Then empty Recently Deleted to actually free the space.
Step 1: Open the Duplicates album
The built-in duplicate detection lives in the Photos app on all recent iOS versions:
- Open Photos.
- Go to Albums (in newer layouts, scroll the Collections list).
- Scroll down to Utilities.
- Tap Duplicates.
You'll see detected duplicates grouped side by side — usually pairs, sometimes three or more copies of the same shot. Above each group is a Merge button; in the top corner, Select lets you handle many groups at once.
Don't see a Duplicates album at all? That means iOS hasn't detected any duplicates — the album only appears when there's something in it. On a new or freshly restored iPhone, detection takes time: it runs in the background, typically while the phone is locked, connected to power, and on Wi-Fi. Give it a night on the charger and check again. Apple covers the feature on its support site.
Step 2: Merge — and what Merge actually keeps
Tap Merge on a group and iOS does three things:
- Keeps the highest-quality version. If one copy is full resolution and another is a compressed re-save from a chat app, the full-resolution one survives.
- Combines the metadata. Captions, keywords, favorites, albums, and date/location info from all copies are folded into the surviving photo, so you don't lose organization work attached to the "wrong" copy.
- Moves the redundant copies to Recently Deleted, where they're recoverable for 30 days.
This is why Merge beats manually deleting one of the pair: you don't have to figure out which copy is the better file — iOS decides on quality, and nothing attached to either copy is lost.
To clear the whole album in one go: tap Select, then Select All, then Merge, and confirm. On a first cleanup of a large library this can collapse hundreds of copies in seconds.
Step 3: Empty Recently Deleted to get the space back
Merged duplicates don't free storage immediately — they sit in Recently Deleted for 30 days as a safety net. To reclaim the space now:
- Go to Albums > Utilities > Recently Deleted.
- Authenticate with Face ID or Touch ID (the album is locked by default).
- Tap Select, then Delete All, and confirm.
If you're not in a hurry, skip this step — iOS empties the album automatically after 30 days, and keeping the buffer means any merge you regret is recoverable.
One iCloud note: if you use iCloud Photos, merges and deletions sync across all your devices. Delete a duplicate on your iPhone and it's gone from your iPad and Mac too — one cleanup, everywhere.
What the built-in tool won't catch
Here's the honest limitation: the Duplicates album matches exact and near-exact copies only. It's designed to be conservative so it never groups two photos you'd consider different. That means it will not flag:
- Burst shots and retakes — five photos of the same scene taken seconds apart are all "unique" to it.
- Similar angles of the same subject.
- Edited versions that differ visibly from the original.
- Screenshots of similar content taken at different times.
In most libraries, these near-duplicates outnumber true duplicates several times over. If you open the Duplicates album, merge everything, and your storage barely moves, this is why — the real bulk is in lookalike shots the built-in tool deliberately ignores. We explain the exact-versus-similar distinction in more depth in our complete guide to deleting duplicate photos.
Step 4: Clean up near-duplicates
You have two options for the shots the Duplicates album misses.
Manual review. Scroll your library month by month, find clusters of retakes, zoom in to pick the best one, and delete the rest. It's genuinely effective — you're the best judge of which group shot to keep — just slow for big libraries. Tips for making it painless are in our guide to finding similar photos on iPhone.
A similarity-based cleaner app. Third-party apps use perceptual hashing — a visual fingerprint of each photo — to group shots that look alike even though they're different files. The app clusters your retakes, suggests a keeper, and lets you batch-delete the rest after review.
How our app Sweep does it
Disclosure: Sweep is our own app, so this is the maker talking.
Sweep is a free iPhone photo cleaner with a similar-photo finder that scans roughly your most recent 5,000 photos entirely on-device — no uploads, no account. It groups near-identical shots, marks the sharpest/best one in each group as the suggested keeper, and lets you adjust before deleting the rest in one batch through a single native iOS confirmation. Everything you delete still passes through Recently Deleted, so the 30-day safety net always applies.
Beyond the finder, Sweep's month-by-month swipe review (right to keep, left to delete, up to skip, with undo) is a fast way to work through the clutter no algorithm can judge — the blurry shots, old memes, and expired screenshots. The swipe cleaner is free with 100 swipes a day; the similar-photo finder is part of the one-time premium upgrade. If all you need is exact-copy merging, stick with the free built-in tool — Sweep earns its place on the near-duplicates.
A realistic iPhone duplicate-cleanup routine
Putting it all together, here's the order that gets the most space for the least effort:
- Merge everything in the Duplicates album (two minutes).
- Run a similar-photo pass — via an app or manually, most recent months first, since that's where retakes concentrate.
- Empty Recently Deleted when you're confident.
- Repeat monthly. Five minutes a month keeps the album from ever rebuilding; our camera roll cleanup guide turns this into a simple habit.
FAQ
Does this work the same on iPhone 15, 16, and 17?
Yes. The Duplicates album is a feature of iOS, not of any specific iPhone model, so the steps are identical on every recent iPhone (and on iPads running iPadOS). Minor menu naming can shift between iOS versions, but the Albums > Utilities > Duplicates path has stayed stable.
Is merging duplicates safe? Can I undo it?
Merging is one of the safer bulk operations in Photos: iOS keeps the best-quality copy, combines metadata from all copies, and moves the rest to Recently Deleted. For 30 days you can open Recently Deleted and recover anything. After that (or after you empty the album manually), the copies are gone for good.
Why is my Duplicates album empty when I clearly have duplicate-looking photos?
Two common reasons. First, detection may simply not have run yet — it happens in the background over time, mostly while the phone charges. Second, and more likely: your "duplicates" are similar photos, not exact copies. Burst shots and retakes never appear in this album; you'll need manual review or a similarity-based app for those.
Do merged duplicates free up iCloud storage too?
If you use iCloud Photos, yes — your library is synced, so removing redundant copies reduces the size of the library stored in iCloud as well as on the device. The space returns once the copies clear Recently Deleted.
Will deleting duplicates on my iPhone delete them on my other devices?
With iCloud Photos on, yes — deletions and merges sync everywhere, which is exactly what you want for a cleanup. If you use no cloud syncing, changes affect only the device you make them on.
