How to Delete Similar (Near-Duplicate) Photos on iPhone

Apple’s built-in Duplicates tool catches exact duplicates only — same pixels, same metadata. But the real storage hog on most iPhones isn’t exact copies, it’s the 10-20 burst shots of the same moment, the multiple attempts at the same selfie, and the slight variations between Live Photos and stills. Here’s how to deal with those.

What Counts as a “Similar” Photo

These are the typical situations Apple’s tool ignores:

• Burst mode shots — pressing the shutter for a moving subject captures 10-30 frames per second. You picked your favorite but never deleted the rest.
• Multiple attempts at a tough shot — pets, kids, food, group selfies. You shot 5-10 versions, but they’re all separate files.
• Live Photo + still version — a Live Photo is technically a 1.5-second video; the still snapshot is a separate file. Both sit in your library.
• Edited copies — you tweaked a photo in Lightroom or another app and saved the result. Both the original and the edit live in your library.
• Slight angle shifts — moving 6 inches between shots produces files that are visually identical but technically different.

A typical 2,000-photo library has 150-400 similar photos in these categories.

Method 1: Manual Cleanup (Slow but Free)

For a small library or specific events:

1. Open Photos > Albums > Bursts (if you have any).
2. Tap each burst, then tap Select in the corner.
3. Choose your favorite, tap Done.
4. iOS asks: “Keep Only [N] Favorites” or “Keep Everything.” Tap Keep Only Favorites.

For non-burst near-duplicates, you have to scroll through your library and visually compare. This is exhausting and rarely sustained.

Method 2: Photo Cleanup (Recommended)

Photo Cleanup auto-detects near-duplicates using on-device perceptual hashing — the same kind of algorithm Google Photos uses, but running entirely on your iPhone.

How it works:

1. Open Photo Cleanup.
2. Tap Find Similar.
3. The app scans your library (1-3 minutes for 5,000 photos) on your iPhone.
4. You get groups of similar photos shown side-by-side.
5. Tap to keep one from each group. The rest go to Recently Deleted in one swipe.

Free tier: 3 review sessions per day. Each session typically processes 50-200 similar groups.

What Perceptual Hashing Actually Means

This is the technology that lets apps find similar (not just identical) photos:

1. Each photo is converted to a small “hash” — a 64-bit number that captures the visual essence.
2. Two photos are “similar” if their hashes differ by fewer than N bits (typically 5-10).
3. Burst sequences hash nearly identically because the content is nearly identical.
4. Two completely different photos hash very differently.

This works well for actually-similar photos and rarely produces false positives. The trade-off vs Apple’s exact-hash tool is more processing time on first run — but it catches dozens of photos Apple’s tool ignores.

The Safe Workflow for Similar Photos

Different from exact duplicates because the choices are subjective:

1. Backup first. If iCloud Photos is on, you’re already backed up. If not, AirDrop your favorite shots to a Mac.
2. Review side-by-side. Don’t bulk-delete similar photos — they often have meaningful differences (the kid’s eyes are open in one, closed in the other).
3. Trust Recently Deleted. Anything you delete is recoverable for 30 days. If you regret a deletion, restore it.
4. Keep edits separate. If you edited a photo, keep the edit; the original may or may not be worth keeping depending on whether you might re-edit later.
5. Live Photos: pick one format. Either keep all your Live Photos as Live Photos (and delete the stills), or convert Live Photos to stills and delete the Live versions. Don’t keep both for every shot.

How Much Storage Will You Recover?

Typical results from a 5,000-photo library:

• 30-80 burst sequences → 500 MB - 2 GB recovered
• 50-150 near-duplicate groups → 200 MB - 1 GB recovered
• 200-500 screenshots → 50-300 MB recovered
• Total: 750 MB - 3 GB

Heavy photographers with lots of burst usage can recover 5+ GB.

Frequently Asked Questions

How is “similar” different from “duplicate”?

A duplicate is byte-for-byte identical — same pixels, same metadata. A similar photo is visually almost-identical but technically different. Two shots of the same scene 1 second apart are similar but not duplicate.

Will I lose Live Photos when I delete similar versions?

Only if you specifically delete the Live Photo file. Photo Cleanup shows the difference between Live Photo and still files so you can choose which to keep. The default behavior keeps the higher-quality version.

Can I run similar-photo detection on iCloud-only photos?

If iCloud Photos is enabled with Optimize iPhone Storage, the app needs to download photos temporarily to process them. This works but is slower than processing local photos. With Download and Keep Originals, processing is fast (everything is local).

How long does similar-photo detection take?

On modern iPhones (iPhone 12+):

• 500 photos: 15-30 seconds
• 2,000 photos: 1-2 minutes
• 5,000 photos: 2-4 minutes
• 10,000+ photos: 5-10 minutes

The app does all work on-device — no upload, no waiting on a server.

Does deleting similar photos free up iCloud storage too?

Yes. iCloud Photos syncs all changes within seconds. After 30 days in Recently Deleted, the photos are permanently removed from iCloud and your storage quota frees up.

What to Do Next

If you have lots of burst shots, open Photo Cleanup and run Find Similar. Most users find more recoverable storage than they expected — the near-duplicates add up faster than exact duplicates.