There are two different problems hiding behind the phrase "duplicate photos", and iOS only solves one of them for you.
Exact copies are the same image stored twice — a photo you sent through Messages and saved back, a picture downloaded from WhatsApp, an edit exported alongside its original. Near-duplicates are the ten frames you shot of the same sunset, three attempts at the same group photo, the screenshot you took twice. Both waste space. Only the first kind has a built-in fix.
Step 1 — use the built-in Duplicates album
On iOS 16 and later, Photos finds exact and near-exact copies on its own:
- Open Photos and go to the Albums tab.
- Scroll to the bottom, to Utilities.
- Tap Duplicates.
- Tap Merge on a pair, or Select then Merge to handle several at once.
Merging keeps the highest-quality version, combines the metadata from both, and moves the rest to Recently Deleted. If you don't see Utilities at all, either your library has no detected duplicates or the scan hasn't finished — it runs in the background while the device is locked and charging, so on a large library it can take a day or two to show up.
Step 2 — know what that album will never catch
The Duplicates album is deliberately conservative. It looks for copies, not for redundancy. It will not surface:
- Burst sequences — holding the shutter gives you 10 to 40 frames that are near-identical but not copies.
- Repeated attempts at one shot — taken seconds apart, framing slightly different, all of them kept.
- Screenshots — often the single largest category on a phone, and rarely worth keeping long-term.
- Blurry or failed shots — the ones you would delete instantly if you saw them side by side.
On most libraries this second group is far larger than the exact copies. It is also the part nobody automates for you.
Step 3 — empty Recently Deleted, or you free nothing
This is the step people miss. Deleted photos sit in Recently Deleted for 30 days and count against your storage the whole time. Deleting 5 GB of photos frees 0 GB until you clear that album.
- Photos → Albums → Recently Deleted, under Utilities.
- Unlock with Face ID, Touch ID or your passcode.
- Select → Delete All.
One caveat worth understanding: if iCloud Photos is turned on, deleting a photo on one device deletes it on all of them, and frees the space in iCloud as well. If it is off, you are only touching the device in your hand.
Doing the rest by hand
You can absolutely do this without any app, and for a small library you should. The friction shows up at scale: the Photos grid is built for browsing, not for deciding. Thumbnails are small, near-identical frames sit side by side, and every deletion is a tap-and-confirm. Most people last about ten minutes.
Where Flick fits
Flick was built for the second group — the redundancy the Duplicates album leaves behind. It sorts your library into exact duplicates (matched by image fingerprint), bursts, screenshots, visually similar shots and probably-blurry ones, then shows you one photo at a time: swipe right to keep, left to stage for deletion. Nothing is deleted until you confirm a batch, and every bit of analysis runs on your device — no uploads, no account, no server.
Flick is free to try on the App Store. Unlimited cleanup is a one-time purchase covering iPhone, iPad and Mac — no subscription.