Do you use Aperture on your mac for your photos and images? Do you have duplicate images sitting in your library? Enter (A)perture (D)uplicate (D)etector. It is designed to work with Aperture 3.x and will scan your library for duplicates that have accumulated over time and waste hard drive space.

ADD will never delete anything. Detected duplicates are simply tagged with keywords. They are: •ADD Unique •ADD Processed •Date Duplicate •Filename Duplicate •Hash Duplicate •Hash Original •Hash [x] Set:[] •ADD Similar [x]

ADD was designed from the ground up to be safe. Safe with respect to your images and the Aperture library. ADD uses only approved Apple APIs. It communicates directly with Aperture in order to get its job done; guaranteeing that there will be no “funny business”. We have not reverse engineered the Aperture database in order to achieve our goals. We certainly had the option to do that; but decided it was too risky of a proposition given that the structure changes with almost every update to Aperture. The APIs on the other hand have remained stable. The bottom line is that ADD is the safest way available to remove duplicates from your library.

√ Get organized!
√ Save space.
√ Speed up Aperture.

√ Full Library Scanning
√ Scan a selection of images
√ Finds absolute duplicates and potential duplicates.
√ Find visually similar images with Auto-ImageIQ
√ ImageIQ a selection of images to find visually similar pictures.
√ Many Advanced Options
√ Ultimate in safety. ADD only uses Aperture APIs to do its job.

When processing is complete, check your keywords for Hash Duplicate, Date Duplicate, or Filename Duplicate. . . . If you've used ImageIQ look for "ADD Similar 0" through to "ADD Similar 8".

Basic usage guidelines are available at our support website.

We can also automatically generate some smart albums that are very appropriate for processing your duplicates within Aperture. See our support website for further details and instructions.

It certainly makes the chore of de-duping easier.


What's New

Version 3.4.5

Bug fixes.

Customer Reviews

Fast and Accurate! Saved me hours...


After merging a couple of iPhoto Libraries and another Aperture library from a couple of different laptops in my family, I had TONS of duplicate pictures. I went looking for a way to help me pare it down, and found ADD.

I set up ADD to scan by selection, and then Auto-Reject. Just select a project, then select all photos in the project. Switch to ADD and click “Scan Selection”. In a few seconds, it will scan for duplicates, mark the dupe as rejected, and it’s done. You can look in the “Rejected” folder in Aperture and delete whatever you want. I have over 26,000 pics in my Aperture library, and this helped me clean it up fast.

I like ADD because I have control. It doesn’t auto-delete anything. You can also set it up to just tag a duplicate instead of rejecting. I did the first few projects this way. You can then go into the project and search for the tag (Hash Duplicate), and manually delete every-other picture. After a few projects, I began to trust ADD and let it auto-reject to save me time. I still look thru the Rejected folder, but haven’t found any problems yet.

I haven’t tried the Image IQ Selection yet, but if I need it, I’ll update the review.



I mean like ridiculously slow. I tried running ADD on my 9000 or so images. I stopped it after 7 hours…when the app's bar said it was still only aroun 15% done. Wow…9000 images is farily small IMO. This is not a usable product for a full libarary scan I would say…at best for under 100 images which I probably dont need a tool for. After stopping the tool, I googled a bit more and found Duplicate Annihiltor. For comparison, it ran MD5 hash comparison my my 9000 images in 30 or 40 min.



This is a complicated tool that works really well. the developer is serious about this product. While its not "easy" to use, mastering it's utility has been highly useful for me in sorting out duplicates in Aperture.


Blue Pill Software Ltd.
1.5 MB
Age Rating
Rated 4+
© Blue Pill Software Ltd.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.