Research Assistance Question - Cross-platform or Syncing E-Reading

There is an overwhelming amount of material to read and keep track of. Is anyone using an on-line or cross-platform PDF/Ebook reader that syncs? In other words, in order to move between devices and spend as much time as humanly possible reading ( ) it would be ideal to have a service where you could either upload your pdf/ebooks and read them on-line (meaning you always know where you are in reading) or else a local program for phones/tablets/desktops which syncs reading locations and documents between instances.

Anyone already using anything like that? This must be a basic function and need of all college and post-graduate students and teachers today. I am sure there are going to be some paid services which may or may not be worth it, but the ideal answer is the closest thing possible to open source and free.

I googled and see some threads that I haven't started reading yet:

https://www.slant.co/topics/10075/~…eading-position

https://kitaboo.com/9-best-cross-platform-ebook-readers/

https://pdf.online-reader.com/

https://www.guidingtech.com/32838/sync-ebook-read-positions/

https://ebooks.stackexchange.com/questions/3637…cross-pcwindows

I have a love/hate relationship with Amazon too - 99.99% of which is hate!

I think the ideal answer is going to be something that is crossplatform and allows for storing of the ebooks/pdf on a dropbox or nextcloud or similar cloud service, and they syncs the notes and last position by storing something into that cloud folder.

It could be either an app/program or a web-based reader that works inside a browser, but I think an installable app/program would probably be preferable

Or at least that's my current thought.

I am finding that Calibre has some features of which I was not aware. Apparently it keeps all your bookmarks / annotations in a single file, and then you can go that file to click and open an ebook at the desired point. I see that Calibre also has some form of sharing over the web to allow you to read your books remotely, but I haven't figured that out yet. This article hints at some of these features and also talks about Zotero, which also seems to be something that might be useful. I played with Zotero in the past but gave up trying to figure it out - might be time to look into it again.

Don you are actually or effectively a professional researcher. Do you have experience with Zotero?

Note: I see Zotero has a direct competitor - MENDELEY, a British site.

Comparison: https://med.mercer.edu/library/mendeley_vs_zotero.htm

I see Mendeley is owned by Elsevior and that probably means a negative corporate influence

My next question is whether these allow you to read online from more than one computer, and if so how their ability to do that compares with a Calibre server. (this is the stage of complexity in the past where I generally gave out of steam to figure out)

Thanks Joshua. I was not originally thinking of ebooks but that is definitely part of the picture. It is so much easier to read on those for long periods of time than a computer screen or smart phone.

I had a nook a while back and got some reasonable use out of it, but I tend to want to be able to make notes and save them in outlines, and for that the computer works best.

But definitely ebook readers have a place in this discussion and I need to update my research on those as well.