We highly recommend that you first try to install the mobile app from an Android app store - Google Play or Amazon Kindle Apps - so that your app will stay up-to-date with the newest features and fixes.
However, if you can't access an app store, you can also directly download and install the Android app apk file from:
www.readcube.com/download/android
You may need to change your device settings to allow installations from "unknown sources". This setting can be accessed in the general device security preferences.
Please note - installing via this manual apk route will not automatically update the app when we release new versions. You will need to re-install with the new apk file (available with the above download link on the same day that the Google Play update is released).