This is only an ok app. It is not intuitive, does not come with easily available instructions, and has Japanese text on the dialogue boxes and no way to eliminate it in the preferences file.
I had to go on-line and google how to use it.
That being said, it did eliminate about 600 duplicate photos for me, which was great - it freed up space so now I dont have to see an annoying notice every time i use my iPhone or ipad that ive run out of icloud space.
I would recommend it only to people who really need to get a handle on their photographs and who dont mind being frustrated by a lack of instructions.
Scrumblegirl about Duplicate Photos Fixer Pro, v1.8.1