Trying to Incorporate Vuforia services in App

Hello, 

The company that I work for is developing an app for iOS and Android that could take advantage of Vuforia's object recognition services. The app will allow the user  to scan barcodes of everyday consumer products or scan the product itself. Once scanned the app will show the user information about the product (i.e. brand name, production timeline, UPC, among other things). I have been researching how to use Vuforia's services for this app but from what I'm reading, the Object Recognition service can only be used in conjunction with the Vuforia Object Scanner which is only available for Android (Galaxy S5 and Nexus 5). Is it true that in order for the app to utilize 3D object scanning and object recognition, the user would need one of these two devices? 

Also, in order for the product information to be made available to the consumer the object target would have to be stored in a large cloud-based database. Cloud recognition does not seem to be available for object targets so they would have to be stored on the device database. This would not be able to hold the large numbers of object targets we would, in theory have. The app is aiming to be very consumer-driven. Is this idea even feasible using Vuforia's services? 

Thank you for your time.