I’m close to finishing the multiple feeds to get hotel quotes on the Android app for HotelPlanner. I’m using the volley messaging framework, which is quite nice at handling the lower levels of message transport. In both the hotel list and the room rate list, I request rates from multiple vendors and merge them into the native UI as they arrive. In the end, I was very sorry that I used wkWebViews in the iOS app. It was quite expensive in terms of both memory and performance, and not as reliable as I would like. But the json feeds are lightening fast and I am very happy with them. I am keeping the webview for the checkout page only since I don’t have a good api for that, and it’s difficult to test thoroughly. And quite important when you’re taking people’s money that you don’t make mistakes!