I've been rather happy with Librera, although when reading foreign languages, I prefer KOReader for its locally installed dictionary lookups (you have to add th

I've been rather happy with Librera, although when reading foreign languages, I prefer KOReader for its locally installed dictionary lookups (you have to add them). Note that these are both reader software, first, and not advanced library management packages (as far as I know). The last I checked, Librera also had two versions on the Play store, with the paid pro (or whatever) version sending a few dollars towards the Ukrainian developer. Who's been donating to the defense efforts since the war started. Or was; that language now appears to be gone from the web site. Anyway, for those not familiar with FDroid and/or who want to contribute to development other that via PayPal -- or, looks like now that would be Patreon. https://librera.mobi/ https://librera.mobi/ For those who asked: Humble Bundle is another source of DRM-free ebooks.