Comment by ce4

Aard2 for Android exists since at least 2015:

https://f-droid.org/packages/itkach.aard2

I have many current and old dumps and can switch between a few years. Very nice in case of deleted articles or to check old time stamped versions. It also supports more than just Wikipedia like wikiquote or wikivoyage or cooking wiki. You can compile own mediawikis too