The best PDF viewer is a no-brainer. If not, you really don’t need a PDF viewer, because most text files (PDFs included) can be read by most other applications. You can always just go PDF to start reading a PDF. Why did I write this? Why now? Most people that have experience with using a PDF reader or viewer will remember how confusing PDF documents can really be. In most cases, they will come across situations where reading them can seem like a nightmare. How often do I have to deal with this? Most people don’t. At best, they never see it; some use tools like PDF or PDF to help mitigate some problems. Most people just avoid PDFs altogether. Why do I have to learn so many PDF readers? If you are using Adobe Acrobat Reader, then most people have no use for non Adobe applications. If.