Is it possible to buy one product for use on all Mac devices?

PDF Reader Pro from Mac App Store

If you download or purchased PDF Reader Pro from Mac Apple Store, you can install and use it in different Mac devices with the same Apple ID logged in and don't need to pay extra fees.

PDF Reader Pro from our Official Website

If you purchase PDF Reader Pro from our official website, you will receive a license code to activate PDF Reader Pro. One license is for one Mac. If you want use it in other Mac device, you need to unbind the license code. Please drop a line at support@pdfreaderpro.com with your license code.