Moodle Mobile has been around for a while. It offers features that enable learners to view courses, track their progress, receive notifications, post in forums, submit assignments and also do all of this offline. Moodle was able to create a product that caters to the broad spectrum of mobile consumption, spanning both online and offline scenarios. That is indeed commendable. The app, rated 3.4 on Google Play, needs certain web-services to be activated on your Moodle installation. The latest Moodle installations come equipped with those services as well.