At it’s base level, the coding is very different on both platforms. We won’t bore you with those details.
From a development standpoint, at Rocksauce we understand that the Human Interface Guidelines for both platforms are very different. The iPhone only has one button and the process of going back a page is very different than from an Android, which has an actual back button. It’s important to understand the differences between the two and most importantly to know which platform is ultimately best for you, we understand that here at Rocksauce.