Just one suggestion.
Add in links for CAD files like on the website. The eDrawings Viewer app can handle solidworks files (and edrawings).
Otherwise...Its about time! Navigating the McMaster website on a mobile platform was terrible. I had been checking almost monthly for a McMaster app, and it finally showed up! Neat interface.
michael.hill.10 about
McMaster-Carr, v1.0.1