PowerReader Lite vs RFCReaderPlus

PowerReader is a simple but powerful reading tool.
 Features: 
 - It is available to view the files with various formats as below: txt, pdf, png, jpg, tiff, gif, bmp, htm, html, doc, xls, ppt, docx, xlsx, pptx. - Supports landscape view mode. - Diverse kinds of encoding for txt reading. - Turning pages forward or backward quickly. - Uploading files through iTunes. - Automatic line breaks. 
 - Full text search, you can easily search the entire text. - Online Translation engine. - Automatically save the last reading point. - Automatically separate the big txt file to accelerate the access speed - More features in full edition: - It is also available to play mp3 & mp4 files. - Supports Google docs downloading. - Supports "Open-in" feature, you can open the supported data from mail, safari or some other APPs that supported open-in feature. - Various types of font for txt reading. - Text color and background color setting. - Bookmark feature. - Single/multi page display for PDF viewer.

Requests for Comments (RFC) document series contain technical and organizational notes about the Internet. RFC Reader plus is a tool which can provide user a more efficient way to read the RFC documents.  Difference between trial version and full functional version: Features for RFC Reader plus trial version and full functional version are almost the same, except that some advance feature in trial version can be used with limitation. All features below are available for try with limited times with trial version and are fully supported by full functional version if user purchased the product in the app. 1. List all RFC documents 2. Search RFC File by Keywords or RFC number 3. Add to favorite for the interested RFC 4. Support marking text with color when reading in text format 5. Support adding Bold, Itatic and Underline styles to RFC text when reading in text format 6. Support changing default Font name and Font size for RFC text reading 7. Support fast navigating to last reading position and can go back and forward several times 8. Support fast navigating with Table Of Contents (TOC) 9. Offline RFC reading: Once you read it once, it will be cached locally 10. Save your changes to the document in Document folder 11.Support both Landscape and Portrait reading mode on all supported devices. 12. Support cleaning up cached files 13. Support search by keywords in Text format RFC page and navigate to the found results 14. Support read RFC in PDF format 15. Support searching RFC content when reading in PDF format 16. Support navigate RFC content through Table Of Content when reading in PDF format 17. Support navigate RFC content through PDF thumbnail 18. Support view RFC content in thumbnail grid view 19. Support read RFC in HTML format 20. Support navigate back and forth when reading in HTML format 21.Support navigate through Table Of Content when reading in HTML format for some RFCs 22. Support add to favorite RFC list when reading both in PDF format and HTML format 23. Support system Dark Mode