I have to constnatly merge PDFs, JPEGs, PNGs, etc. for my work and this app will do it all. You can merge everything seamlessly without having to manually merge the PDFs (this saves a lot of time, especially with my older mac). You can also organize the PDFs from within the app and you can also filter certain pages to be included or not in the merged PDF.Update: It still works well on Big Sur

I bought this hoping that it could merge .tif's into multi-page tifs, but looks like it can only take those tifs and turn them into pdfs. It merged the files just fine into that PDF so the apps is a-okay, but just a heads up that you'll only get pdfs out, unless I'm missing something.

I have used this application multiple times and it does what it’s suppposed to do. Was able to merge several large PDF documents w/o error. My only commnet is - possibly a bit more feedback to user as the merging is occuring (IE clearer indicator of when the merge is done).

5/3/17 - PDF - Merge is great. A real time saver when used instead of using Preview. However, annotations made to a pdf file may not show up after merging. So, check your file in the merged group to see if annotations are still there.