mobile app assignment

See how to create an example web service in Android. Page 174,   Chapter 6   Getting Started with Android - Alternative Formats See how to create an example web service in iOS. Page 214,   Chapter 7   Getting Started with iOS - Alternative Formats

For submission : Read carefully about 2 different approaches for creating a web service from above. Then

(a) compare the two approaches and

(b) explain 2 advantages of each approach relative to the other.