Pooch Pantry Plus
Conceptually I was delighted as I've struggled with the Shopify product template because of format and image issues on the wholesaler's files. Sadly the drop downs for mapping fields were blank, so I tried to count where column headers should have been. I got to then end and was prepared to see my cleaned up file... alas, error so it is now a deleted app. Such a pity, I was so hopeful. Guess that's what you get for the great price.
Sorry that the tool was not working. Often vendor data is not clean and can cause errors in the tool. If you could send over the file to support we will try to assist.