Your files can be downloaded as ZIP files immediately after successful payment.
Downloads are available for 72 hours on the same device you used to make payment, from your purchase receipt page. Just click on the big green DOWNLOAD button!
Please note that cookies must be enabled to provide access to downloads.
Getting ZIP files downloaded if you purchased on an iPhone might be a little harder, if you have an older phone. It IS possible to save a ZIP file using the Files app, but that doesn't necessarily mean you'll be able to open the file after that! Please see this article: https://osxdaily.com/2018/06/22/how-save-zip-file-iphone-ipad/