Catalog Maker by EasyCatalog

After testing a wide range of catalog maker apps within Shopify, I can confidently say that easycatalog is superior by far in terms of adjustability and functionality, and perfect for my wholesale companies needs. It's reasonably priced (arguably one of the cheaper options too) and support is amazing. Fast responses and willing to go above and beyond, they've even built additional features per our request.

Cannot recommend enough