What are /r/wikireader's favorite Products & Services?

From 3.5 billion Reddit comments

you should get cheap android phone, don't connect it to anything, but install kiwix app

https://play.google.com/store/apps/details?id=org.kiwix.kiwixmobile

and download ready-made kiwix wiki (depending on sd card size, you may choose small no-image version or full with-images version)

https://wiki.kiwix.org/wiki/Content

You should look at getting a cheap android device, as there are quite a few full sized wikipedia conversions including graphics available for that platform. You would need a very large microsd card too.

Yes, kiwix is very good.

https://www.kiwix.org/en/downloads/kiwix-reader/

It uses the ZIM file format.