Well…technically speaking this app is for anyone in the AEC industry but architects will gain the most from it. The famous McGraw-Hill Sweets Catalogs were and still are valuable resources for building product information for anyone specifying building materials.
Basically Sweets Building Products for iOS allows you to search for building products by hundreds of manufacturers. You can browse by CSI-spec number, view, download and email files such as CAD, BIM, Specs and catalogs themselves (likely PDF files) and much more directly from your iOS device such as Apple iPhone or Apple iPad.
You can download the free app from the Apple iTunes store.