Kindle trick
philjaco

Thanks everyone, I managed to get Calibre working and am reading Kindle PDFs in Lingq now. It's truly a game-changer!
Gigusek

> Curious if anyone else has been using it or if anyone has come up with an easier way to put books in Kindle.
Much easier to export Kindle books to Calibre and remove the DRM (there are guides on how to do that) and then convert them to whatever format you like using Calibre.
Another way and much easier (but not more efficient) is exporting your Kindle highlights using an app like Readwise. But then you're of course only limited to how much you can highlight in your book.
noxialisrex

For those needing to take physical photos, VFLAT works well. You can have another app do the OCR (Google) if you want to get past the 100 page to text limit per day. It takes time, but in some cases is necessary.
This has worked well for me with some books in Icelandic, Low German and Frisian where getting the ebook is nearly impossible.
bamboozled

Text recognition works out of the box on recent Apple devices:
https://support.apple.com/en-us/HT212630
Copy and pasting some Chinese text from a photo (of a photocopy) worked just fine for me. Accuracy seems to be great as well.
noxialisrex

Even with Icelandic which has þ and ð (and áéíóúýæö) OCR is nearly perfect if the image and lighting are good.
asad100101

The below trick mentioned by Peter was a game changer for many learners. Take a look at :
Since I had to configure a new Win 10 PC yesterday, I also had to install some software like Calibre, Kindle for PC, etc. So here is the procedure for creating Kindle-DRM-free e-books for a Win 10 system in a bit more detail:
1. It´s crucial to use the older Kindle version 1.17, not a newer one! Then the conversion process to a DRM-free format should work just fine for many, but perhaps not for all Kindle e-books. Here you can download the Kindle for PC v 1.17 app: (Note: Disable the option "Install available updates automatically without asking" under "Tools - Options - General", otherwise Kindle version 1.17 will be replaced by a newer one!).
2. Install and open the Kindle app, click on the e-books in your Kindle library that you want to convert and download them to your hard disk (the default path is: C:\Users\YOURUSERNAME\Documents\MYKindleContent\)
3. Download both Calibre and the plugin DeDRM (the newest versions should work just fine). Here is the link for DeDRM:
4. Unzip the DeDRM plugin to a folder, for example: "DeDRM_tools_7.1.0".
5. Start Calibre and add the plugin via "Preferences"by navigating to the folder "DeDRM_tools_7.1.0" and choosing the zip file "DeDRM_plugin" ().
6. Restart Calibre.
7. Add a Kindle e-book that you downloaded in step 2 to Calibre. The default mode is to remove the Kindle book's DRM immediately (in other words, you don't have to do anything!).
8. Convert the book with Calibre to an e-book format that LingQ can import, for example PDF (you can find the converted, DRM-free e-book in your Calibre library on your hard disk: ).
Note: This is neither rocket science nor computer science, so any regular user should be able to follow the above procedure.
Hope that helps & good luck
Peter
azarya

use calibre to remove the DRM and then import to Lingq. see for example: https://www.lingq.com/en/community/forum/premium-access-forum/help-converting-book-in-calibr