Read about ‘Building the Derby App in Android’ – Page 174 (see Chapter 6 Code) and ‘Building the Derby App in iOS’ – Page 214 (see Chapter 7 Code) :
For the submission :

outline the steps for building the Derby app in Android.
outline the steps for building the Derby app in iOS.
compare the two approaches by explaining 2 advantages of each approach relative to the other.

3 pages with references