Adobe Reader is a desktop and mobile application belonging to the Adobe Acrobat family of software.
Now known as Acrobat Reader, it is available as freeware – proprietary software which you don’t have to pay for – and gives basic functions such as viewing, printing and annotating PDF files.
Users can unlock further functionality by either paying a subscription of a one off cost. The commercial proprietary Acrobat, which is only available on Windows and OS X, can create, edit, digitally sign, encrypt, export and publish PDFs.