If you are looking for a PDF reader that actively promotes collaboration, then you should consider Foxit Reader. You will also not get any PDF protection features.

It doesn't have any PDF editing features.The interface has a very simple ribbon-style menu to make it easier to find the tools you need.It has a lot of annotation tools to make collaboration easier.

The touchscreen mode makes it so much easier to read a PDF document.

It also has a document converter that you can use to convert PDF to various formats including Word/Excel/PPT/Text/HTML/ XML/image (PNG, JPEG, BMP, TIFF, GIF)/RTF, and more.

It also allows you to add permissions and passwords to protect the PDF document.

Its advanced OCR function allows you to easily convert scanned PDFs to editable text.

You can also use the annotation feature to highlight, underline, add notes, and even strikeout text.

You can add and delete text, add images and manipulate the PDF pages in numerous ways.

It also goes you the rare opportunity to edit your PDFs in numerous ways.

It has a dark mode to protect your eyes at night.

You can open and read any PDF document without any limitations to the size or page range of the document.

The following are just some of the things that you can do with UPDF

Free downloadable adobe reader