This document discusses Xamarin, a mobile development platform that allows developers to build native iOS, Android, and Windows apps using C# and a shared codebase. Key features highlighted include building apps with native user interfaces and performance while sharing application logic across platforms. It also lists the fully supported APIs for iOS and Android development and introduces Xamarin.Essentials, a collection of useful APIs for common mobile app tasks.

1. Essentials for mobile success
Intelligent cloudBuild, test, distribute, learnBeautiful native apps

2. Xamarin: Anything you can do in Objective-C,
Swift, or Java, you can do in C# and Visual Studio
• Native user interface
• High-fidelity API access
• Native performance

3. iOS C# UI Windows C# UIAndroid C# UI
Shared C# logic
.NET for Mobile Apps
Shared C# codebase • 100% native API access • High performance

4. iOS—100% API coverage
MapKit UIKit iBeacon CoreGraphics CoreMotion

5. Android—100% API coverage
Text-to-speech ActionBar Printing Framework Renderscript NFC

6. Xamarin
3 Native User Interfaces
Shared App Logic
iOS C# Android C#
Shared C# logic
Windows C#
Shared C# logic
Shared UI Code
Shared Native User Interfaces
Shared App Logic

7. Native performance
Xamarin.iOS does full Ahead Of Time
(AOT) compilation to produce an ARM
binary for Apple’s App Store.
Xamarin.Android takes advantage
of Just In Time (JIT) compilation on
the Android device.

8. Xamarin.Essentials
aka.ms/xamarinessentials
Flashlight
Geolocation
Preferences
Device Info
Device Display Info
Secure Settings
Accelerometer
Battery
Clipboard
Compass
Connectivity
Data Transfer
Email
File SystemGeocoding
Gyroscope
Magnetometer
Phone Dialer
Screen Lock
Sms
Text to Speech
Vibration