Sorry to ask this, but I know that it was initially only on Samsung phones and not tablets.
The indications from what I can still see on the website is that it only supports Samsung phones.
"Changes you make to images on your iPhone, iPad, or Android phone are automatically synced with Lightroom on your desktop".
Source (bottom of page) Download Lightroom for mobile | Adobe Lightroom for mobile
From version 1.1 Lightroom mobile (Not CC as such) supported tablets. I'm running it on a Tab 3.
Many thanks for clarifying.