When comparing Sumatra PDF vs PDF Reader Pro, the Slant community recommends Sumatra PDF for most people. In the question“What are the best PDF editors?” Sumatra PDF is ranked 11th while PDF Reader Pro is ranked 14th. The most important reason people chose Sumatra PDF is:
Sumatra is available for free, licensed under GPL with source code available on [GitHub](https://github.com/sumatrapdfreader/sumatrapdf).
Ranked in these QuestionsQuestion Ranking
Pro Free and open source
Sumatra is available for free, licensed under GPL with source code available on GitHub.
Pro Starts quickly
Pro Low resource usage
Pro Does not have heavy editor features
Annotations and other heavy features are just not needed in reader.
The application consists of a single file that can be run without installation. You can put it on an external device, such as an usb thumb stick and run it on any Windows machine from the thumb stick.
Pro Extensive keyboard shortcuts
It's available in 69 languages.
Pro Elegant interface
iOS, Android, Mac, Windows.
Pro Able to read a lot of formats.
Allow to view, store, and manage various document file formats, including iWorks, MS Office, text, images, audio, and video files
Pro Tie work on all devices together.
PDF Reader supports transferring files from email, web, and mainstream cloud storage services.
Con Lacking in features
Sumatra aims for simplicity at the expense of functionality. For example, there's no way to annotate PDFs or edit them.
Con Windows only
Con Fonts are not smooth enough
Not as smooth as e.g. Adobe Reader. No anti-aliasing
Con Cannot crop empty fields
Just got used to this killing feature on Goodreader on Mac.