We run a wholesale food business in Dubai and we're talking to agencies to build a new web portal and mobile interface where our B2B clients can place orders. One quote we got was for a total of 48,000 AED. Looking through it, I noticed a separate line item of 19,000 AED labeled "UI / Interface Design," with software development and the database priced separately at 29,000 AED.
The freelance developer we used to work with just coded the pages directly; I've never seen this kind of breakdown before. Frankly paying 19,000 AED just for picking colors, placing buttons, and a few screen mockups feels pretty steep. On the other hand, another agency gave me a lump-sum quote of 35,000 AED but I couldn't quite tell if UI design is actually included in that.
What exactly is an agency required to hand over for UI design? Am I just getting a colorful PDF screenshot, or is there an actual technical standard for handing this off to development? How can I compare these quotes apples-to-apples?