I have an old 2009 Kindle 4 with its low resolution screen. I work in academia so I read books, articles and technical documents in PDF format on a daily basis. I once tried to use my old Kindle for that but it caused more pain than it helped because the screen is too small, the resolution is too low and it is rather slow for zooming in and out.
I literally waited years for Amazon to release a bigger screen version (8" or more) of a Kindle but it seems that I could just die waiting for that to happen. Therefore I am in the hunt for something better than my 6" Kindle mainly for PDF purposes and the occasional MOBI/EPUB book. I considered the following options:
The Sony DPT-RP1 would of course be anyone's first choice for such a purpose but I work under Linux and an old version of Mac OS X and the device is incompatible with these two systems. I also find the price to be a little exaggerated for what it really does (exclusively for PDF files).
The reMarkable 10" tablet seems promising but then there is that price tag on par with the Sony. What is more, I am really just interested in being able to read my books; I really do not need to be able to download and install new apps or take fancy handwritten notes.
The Kobo Aura One with its 7.8" screen has very good resolution. I want to believe that it might just be enough for my purposes on landscape mode. But I read reviews on how poorly it handles PDF files. Then I read about koReader OS which apparently handles PDF files much better than its original OS.
I also just read about the new 7 inch version of the Kindle Oasis. The screen is a little smaller than the Kobo Aura One's. But then I would tend to trust Kindle's OS a lot more because it has proven to be reliable.
Is the Kobo Aura One a good ebook reader for PDF files (under koReader)? Does the new 7" Kindle outperforms it? Or is there a better option on that price range (250 ± 50 USD)?