30
Any good ebook readers for Android?
(lemmy.ml)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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Yep get a second hand Kobo for £30 and install Koreader on it. Or if you fancy, Kindles can be had cheaper, but they will require a jailbreak to use Koreader.
You can install KOReader on Android as well. Well it lacks OPs material Design requirement, but it fulfills the other.