Unik: Duplicate Image Finder for Android

Can't find how to change the folders to look in. I changed the setting to the lowest possible discriminator and it still did not come up with new images.

This program would be perfect if it weren’t for a MAJOR flaw in its interface. A previous user mentioned this problem in a review from 2013, and it definitely remains true today. For starters, this program seemingly does what it does amazingly and the interface looks *deceptively* easy and intuitive enough to hit the ground running. It gives a visual list of what it finds, and puts a yellow star by the pictures that it thinks should be kept. You can then manually inspect further and put a green star (but not yellow star) by any mis-identified duplicates that you think should be kept. But here’s the problem — the green star essentially means NOTHING. After you’re done and ready to click the “Unik!” button to have it start deleting, it will only preserve anything that has a YELLOW star. This means GREEN starred images get deleted too. That’s a dangerous interface design flaw that almost breaks the program. This either needs to have a way to exclude green starred images from deletion as well, or needs to do away with the green star thing entirely and let you put yellow stars by the images you want to keep. I was almost about to request a refund until I found a workaround at the last moment. 1 - Go ahead and use the program normally by putting stars (regardless of color) on the pictures you want to keep. Un-star the pictures you want to delete. 2 - When ready to start deleting, DO NOT CLICK “Unik”. Instead just right-click (or click “Edit” in the menu tray) and choose “Select All but Stars”. 3 - Finally, right-click again (or again click “Edit” in the menu tray) and choose “Remove”. Given that this program has been five years since its last update, I don’t expect the issue to be addressed, but at least it’s very decently usable so long as you remember to never use the “Unik” button.

THANK YOU, UNIK! you just saved me HOURS of sitting in front of the computer comparing images. For some reason (!) my pictures were duplicated, all in the same (sometimes different) folders but with different names. Grab the folder(s), drop them and it compares them, press a button and it gets rid of all the duplicates, selecting the best one (based on resolution, file size or oldest before modifying). If you want to keep more than it suggests, you can, although normally you dont need to. Sometimes it’s confusing because if you have two very similar images they might appear in many “groups”, so basically the one at the left is the “main photo”, and if theres something alike it might show at the right, but if you have the “sensitivity” very high, that one might become a “main photo” below as well and also be kept. So basically, put your sensitivity at 99% and trust it.

I don't know the universe of duplicate-identifiers out there but this does a fine job on an absolute basis. You have to play a little bit to really get it primed to erase only those selected, but once you play with the include/exclude star options, you can get there. I like that you can specify percentage similarity because relevance and accuracy will depend on image content to some extent; you can search iteratively. Very useful for me!! I really appreciate this app; thank you. Best two bucks I've spent.

The reason for my high rating is that I have been using Unik to remove duplicate images for a few years now. I know that there are several choices for duplicate image detection apps, and a few of them are pretty good, but Unik was the app I kept coming back to. Even though its interface isn’t that slick and it doesn’t allow for too much flexibility (more on that later), I still preferred it because it was so efficient, simple, and user-friendly. I recently upgraded to El Capitan and discovered that this app no longer seems to work even though it isn’t labeled as being incompatible (the app launches, but it crashes once I try to actually use it). I realized that this app hasn’t been updated in over two years, so perhaps it’s time to create a new version that is guaranteed to be compatible with El Capitan (and, ideally, whatever comes afterward). If you do update this app, perhaps you could also incorporate some improvements. The first improvement that I suggest is to allow for more transparency and flexibility in the selection and removal of images. This could be done by allowing users to know and set the priority and/or direction of the selection criteria and/or by allowing users to toggle key images or add/remove key images to prevent both the accidental deletion of images and the unnecessary retention of them, as well. The second improvement that I suggest is to allow users to add images via an in-app button and/or an item in an in-app drop-down menu. While it’s nice that you can add images via drag-and-drop, having drag-and-drop as the only option for adding images can be inconvenient when trying to compare images from multiple sources, as it means having to go back and forth between Unik and the Finder.