In 2010, Adobe released Adobe Reader X (version 10.0), which marked a significant shift in the software's development. This version introduced a new user interface, improved performance, and enhanced security features, such as Protected Mode and sandboxing. Subsequent versions, including Adobe Reader XI (11.0) and DC (2015), have continued to build on these features, with a focus on security, accessibility, and collaboration.
Adobe Acrobat Reader is the free standard for viewing, printing, and signing PDFs versions of adobe reader