Batch rename your files. Add a prefix, a suffix, replace some characters, truncate, or capitalize the words. Or put some EXIF data in your file names. You name it!
I was actually looking for a tool like this today after downloading a ton of photos from WA!
One suggestion though: the screenshots make it look like a Mac app, but the yellow UI feels a bit off compared to the native Mac OS design.
Have you considered tweaking it to align more with the macOS aesthetic? It might make the app feel more at home for users.