Uplinkly Digital Downloads

This is simply the best download app on shopify and I've pretty much tried or tested every single one of them. I'm selling PDFs and it provides everything I want, from file encryption to PDF stamping. I had a few problems with a security setting (acually an Adobe Acrobat reader bug) and Michael sorted it out very quickly. The support on this app is amazing. I can't recommend it enough if you want to sell PDFs with very good security against copying.