Genei is described as 'AI powered productivity tool for reading, understanding and taking notes on PDFs and long websites. Users can search, summarise, extract and define keywords, ask google-search type questions and be taken straight to the answers' and is an app in the Office & Productivity category. There are more than 50 alternatives to Genei for a variety of platforms, including Windows, Mac, Android, iPhone and Linux. The best alternative is SumatraPDF, which is both free and Open Source. Other great apps like Genei are Foxit Reader (Free Personal), Okular (Free, Open Source), Evince (Free, Open Source) and Adobe Acrobat Reader DC (Freemium).
Take control of the way your ePubs display. Hyphen comes packed with a ton of options for custom colors, fonts, font sizes, line heights, paragraph indentations, margins - ...well, you get the idea. You can even use styling on a per-book basis.
BePDF is a PDF viewer for the BeOS, Haiku & Zeta. Besides viewing, it supports annotating and user-defined bookmarking for unencrypted PDFs. It's fully localized for 20 languages at the moment with additional languages being easily added via text files.
PDF Assistant - simple in use application, that let you easily interact with any pdf file. Provides ability to make adjustments into pdf and annotate files and user friendly interface will make working with the application simple and convenient.