For 99% of users, is the correct choice. It ensures you have the latest security definitions to protect against "zero-day" exploits often hidden in PDF attachments.

Released in 2012, Version XI (11) was the last version before the "DC" rebranding.

A Guide to Versions of Adobe Reader: Evolution and Features Adobe Reader (now known as Adobe Acrobat Reader) has been the gold standard for viewing, printing, and signing PDF documents for over three decades. Since its debut in 1993, the software has transitioned from a simple document viewer into a sophisticated, cloud-connected productivity tool.