It’s very easy to use:
* Download the app from the Google Play Store, and launch it;
* Click on the “Open” button, select a ZIM file from the list (from your
device or SD card);
* That’s it! You’re already browsing offline content.
If you don’t already have a ZIM file of Wikipedia, Kiwix leads you to
its online repository so you can download one:
Being a mobile version of a feature-rich desktop software, the Android
version is lightweight. It provides access to the most essential
features: opening and reading a ZIM file, search with auto-completion on
article titles, in-page search, random navigation, zoom in & out.