I am just starting out with this app/site and the only thing i see lacking is the ability to import passages via one click.
I understand epub imports are a bit of a hard ask due to costs. But importing webpages eithout copy pasting would make this an ideal language partner.
Readlang another great tool uses bookmarklets to solve this issue. I wouldnt mind going into my android browser and using the bookmarklet to import and then using my android app to continue the rest of my readings