I have a pretty new Samsung Galaxy S3, on Verizon. The Polaris Viewer came pre-installed, but as near as I can tell, it doesn't show up anywhere as an app. But if you use the file manager to open a file with an extension like .doc or .pdf, it will open in Polaris. It seems very good for viewing documents, but so far, using that way of opening it, I can't get it to work for editing (I can't even get a keyboard to appear).