The Walmart-owned Vudu is one of several services that allow you to rent and buy movies online. Much like Google Play Movies, you can rent or buy content in either standard or high definition (abet at around the price of a physical copy) and watch on any supported device. The company has had an Android application for some time now, but the 5.0 update brings a few much-needed improvements.
First off, you can finally save rented content on your device for offline playback.
VUDU app for Android now supports offline playback for rented content was written by the awesome team at Android Police.