Duplete Photo Deleter 4+

I’m quite impressed with this app! It’s full of well-thought-out features, and as easy to use. It’s a great time saver. One of its unique features I especially like is that, when I mark similar photos to keep, I can go back and forth, reviewing all of the similar photos, so I could be sure that’s what I want to do, before I delete photos. The only suggestion I have would be to add an option for reviewing all photos, without limiting to similar ones. This would be useful for general cleanup.

I like how you can see similar pictures at once. Btw: the size is easily adjustable, which is pretty much necessary.

In addition to showing you very similar pictures, It will show you "similar" pictures that to a human, might be significantly different. People milling around, in different places, etc. That's actually helpful, you probably don't need all of those.

Also notices if you marked as a favorite, if it sees faces, etc.
No worries- you get a 2nd chance to save everything before it actually deletes.

This app is really easy to use. Run it and then review each group of similar photos, choosing which to keep and which to delete. The algorithm sometimes is off, grouping photos taken on the same day and location but with quite different subjects, so you do have to pay attention. Overall it's very helpful in pruning my photo library.