This document summarizes a presentation about building a cross-platform chat app using Microsoft Azure Mobile Services. The presentation covers an overview of Azure Mobile Services and its capabilities for storage, authentication, push notifications, custom APIs, and more. It then discusses the design of a sample chat app that integrates these Azure Mobile Services features, including authentication with social providers, storing user and chat data in the cloud, and sending push notifications across platforms. Code examples are also provided for common client-side and backend tasks in Azure Mobile Services.