The short answer
| What you have | What finds it |
|---|---|
| A burst of near-identical shots | A similar-photo search. Compare them and keep the sharpest. |
| The same photo re-saved by a chat app or an editor | The similar search too: the bytes differ, so an exact search cannot see it. |
| Blurry, too dark, too bright or tiny photos | A quality filter that labels each photo with the reason. You decide. |
Why a duplicate finder misses them
An exact-copy search compares the contents of files. That is exactly right for a photo saved twice: the two files match byte for byte, and either can go. A burst shot is a different photo taken a moment later; a re-save is a different file written by different software. To a file comparison they have nothing in common. Finding them means looking at the pictures, not the files. Our duplicate photos guide covers the exact search; this one is about everything it cannot see.
How a similar-photo search works
The tool reduces each photo to a tiny greyscale version and records how brightness changes from one point to the next, which gives every photo a short visual fingerprint. Two photos whose fingerprints differ in only a few places look alike; how few is a threshold you can set. It is a simple method with one limit worth knowing: it sees composition and light, not meaning, so at a loose setting it will also pair the occasional unrelated photo that happens to share a shape.
That limit is why a similar search should never tick anything for you. It can order a group so that the best candidate comes first; it cannot know that the blurrier shot is the one where everyone is smiling.
How ClutterScrub does it: each photo gets a difference-hash fingerprint, and groups form where the fingerprints are close. The slider under Settings, Similar photos, runs from Near-identical, where only burst shots and re-saves match, to Loosely similar, where crops and edits match too, and so do some unrelated photos. Each group lists its photos best first, the sharpest and then the largest, so the suggested keeper leads, and nothing is ticked for you.
Blurry, too dark, too bright and low resolution
Poor quality is a different question again: not whether two photos look alike, but whether one is worth keeping at all. ClutterScrub measures sharpness and exposure while it looks for similar photos, reads each photo's dimensions from the system, and shows all four as a filter on the Photos screen rather than as a verdict.
- Blurry: a photo whose sharpness falls far below the rest of your library, judged against your own photos rather than a fixed bar, and only once enough of them have been measured.
- Too dark and Too bright: camera photos where most of the picture is near black, or at least half of it near white. Judged on the camera folder only, since a screenshot of a dark app is meant to look that way.
- Low resolution: under 1,000 pixels on the long edge, read from the file's own dimensions.
A label is a reason to look, never a reason to remove: the filter shows you the photos and their labels, and you tick what goes. Blurry, Too dark and Too bright come from the similar-photo search, so they appear once you have opened the Similar photos tab at least once; Low resolution needs no search.
Step by step in ClutterScrub
Similar photos
- Open Duplicates from Home and tap the Similar photos tab. The search starts once the exact copies are found, and it runs on your phone.
- Each group shows how much space its extra photos take and a Compare button. The first photo in the group is the suggested keeper, marked Keeper with a star.
- Tap a photo, or Compare, to open Compare photos: the keeper in the first pane and the other photo in the second, one above the other on a phone and side by side on a wider screen. Pinch, drag or double tap and both photos move together, so you judge the same detail in each. Each pane shows the photo's dimensions, size, date and folder.
- Tap the outlined star to make the other photo the keeper, tick the one you are letting go, or Open in another app to see it elsewhere.
- Back on the list, Move to trash sends what you ticked to Android's trash once you confirm. The keeper is never ticked.
Poor-quality photos
- Open Photos from Home. The card already says how many photos are poor quality (open the Similar photos tab once first, so sharpness and exposure have been measured).
- Open the Quality menu and choose Poor quality, or one reason: Blurry, Too dark, Too bright or Low resolution. Each photo in the grid is labelled with its reasons.
- Tick what goes, or review the filtered list one photo at a time with the swipe icon in the top bar (our swipe guide), then Move to trash.
Compare photos: the keeper always in the first pane, the other photo below it on a phone, each with its dimensions, size, date and folder.
The Photos screen under the Poor quality filter: each photo carries the reason it is there, and nothing is ticked until you tick it.
What similar-photo tools quietly get wrong
Ticking the loser for you
A sharpness score picks a winner by one measure. A tool that pre-ticks the rest has decided that measure is the only one that matters, and a cleanup of five hundred groups is where that decision goes unnoticed.
Calling it a duplicate
Labelling two different photos as duplicates invites you to treat them as interchangeable. They are not; the label should say similar, and the tool should let you look.
Hiding the comparison
A pair of thumbnails is not a comparison. Judging a burst shot takes the two photos at full size, zoomed to the same spot.
Removing for good
Even a careful choice between two similar photos deserves a way back. Android's trash gives 30 days; a tool that skips it gives none.
How ClutterScrub handles it: similar groups are never pre-ticked, the compare view zooms both photos together, every removal goes to Android's trash unless you choose Delete permanently, and the search runs with no internet permission, so nothing it reads can leave your phone.
