Qiqqa is by far the strongest solution for research and managing pdf's. Zotero, named as a comparison is weak as it does not allow pdf;s to be loaded into its interface - you need to use a pdf reader, which defeats its whole purpose. With Qiqqa documents in a library can be searched together. It has excellent maps of your libraries. It is not prefect, having a few glitches, but still is the only one of its kind.
Based on our record, GoodReader seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
GoodReader allows you to open multiple PDFs and switch between them. Source: about 1 year ago
Goodreader pdf reader app (iOS) has a mobile view feature that shows any pdf in a more mobile friendly way (strips out text etc to be scrollable). There might be others that do this. https://goodreader.com/. Source: over 1 year ago
Sure. Just don't read goodreader.com, they just tell lies to get clicks, we hate them lol. Source: almost 2 years ago
I have the A5X. I've always ordered direct from Ratta so I cannot speak to goodreader.com 's service, but the HOM pen for the A5 and A6 series is the same as the one for the X series (unless some knows otherwise). Source: over 2 years ago
Documents by Readdle - A central hub for all your files.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
calibre - Ebook manager, viewer & converter
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .