FLUID  targets and reports on in-app and on-device web impressions by:
Device Type– Tablet, Phone or Desktops & Laptops
Device Make and Model– Apple iPhone, HTC Droid Incredible, etc.
Carrier– Verizon, Sprint, etc.
Connection Type– Carrier-based or wi-fi/static
Mobile Operating System- Android, iOS, etc.
Mobile Browser– Android, Blackberry, etc.
System (i.e., device type, device make/model, OS, browser, carrier and connection type), frequency, geography, daypart, segments, and test/control targeting all work for in-app and device-optimized web campaigns.  However, targeting based on position and query strings is possible only for device-optimized web campaigns.