We were asked to create an Android app that would mirror the iOS app and get it completed for a drop-dead launch date in a little over a month (we hit that date).
We were charged to create an Android version of their existing iOS app under a tight deadline but with some specific and complex business logic. The most interesting of which was the caching model so that the app could be used offline and sync seamlessly when connectivity was restored. We chose to mimic the CoreData model present in the iOS app using ORMLite and SQLite.
Through strict Agile adherence and top talent, we hit our tight deadline.