In this chapter, we discovered the Xamarin.Mobile library and how it can accelerate common native tasks in a cross-platform way. We retrieved the contacts from the address book and set up GPS location updates over time. Lastly, we loaded photos from the camera and photo library. Using the native APIs directly would mean twice as much code on each platform, so we saw how the Xamarin.Mobile library is a useful abstraction that can reduce some development time.

After completing this chapter, you should have a complete grasp of the Xamarin.Mobile library and the common functionality it provides for cross-platform development. It gives clean, modern APIs that offer the async/await functionality that can be accessed across iOS, Android, and Windows Phone. Accessing contacts, GPS, and photos across platforms is very straightforward with Xamarin.Mobile.

In the next chapter, we will cover the steps of how to submit applications to the iOS App Store and Google Play. This will include how to prepare your app to pass the iOS guidelines as well as properly signing up your app for Google Play.