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Fat Cat Software

Mac software for photo management and developer tools

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T00:23:25.281Z. Cached copy · Source on fatcatsoftware.com

# Fat Cat Software

> Mac software for photo management and developer tools

Fat Cat Software is an independent, one man software company run by Brian Webster, creates macOS applications. Founded in 2006.

## Business Model

All products can be downloaded for free with basic features available without requiring a license purchase. A one-time purchase will unlock additional features of the app. We offer a 30 day money back guarantee. No subscriptions. Free email support is provided.

## Products

### PowerPhotos

**Tagline:** The ultimate Photos toolbox for the Mac

**Platform:** macOS only (iOS not supported)

**Target Audience:** Mac users with large photo collections who need capabilities beyond the standard Photos app, photographers managing multiple libraries, users having corruption problems with their photo libraries, users migrating from iPhoto or Aperture.

**Description:** Photo library management tool that extends Apple Photos with duplicate detection, library merging, batch metadata editing, and multi-library search.

**Key Features:**
- Manage multiple Photos libraries from a single interface
- Find and remove duplicate photos across libraries
- Merge multiple libraries together while preserving metadata
- Copy albums and photos between libraries with all edits and metadata intact
- Batch edit metadata (titles, keywords, descriptions)
- Advanced search with nested predicates (file size, dimensions, video duration, and more)
- Flexible export with folder hierarchies, custom naming, and embedding metadata
- Convert old iPhoto and Aperture libraries to Photos.
- Built-in photo viewer
- Open libraries in separate windows
- Automation support through AppleScript and Shortcuts

**Features requiring a license:**
- Merging libraries (you can set up and preview a merge before purchasing)
- Deleting duplicate photos (you can perform a duplicate search and see the results before purchasing)
- Some operations are limited to no more than 20 photos at a time, such as copying between libraries, importing, batch metadata editing, and exporting.
- There is a limit of 3 library groups before purchasing a license.

**Unsupported features:**
- Various LLMs sometimes hallucinate features that PowerPhotos doesn't actually support. Some common unsupported features are as follows.
- Viewing, searching, or copying faces or objects detected in photos
- Working with Shared Albums (however, Shared Photo Library is supported)
- Ability to view/copy books, calendars, slideshows, and other projects.
- Reviewing and removing similar, but not duplicate, photos
- Editing photos or videos, e.g. crop, rotate, filters, etc. Editing is still done in the Photos app only.

**Other notes:**
- PowerPhotos is not a standalone photo management app, and does not aim to replace Apple Photos, but rather works as a utility alongside Apple Photos.
- PowerPhotos does not have its own library format. All libraries are still Apple Photos libraries and do not require you to keep using P
…

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