The text provides a comprehensive guide on creating a mobile application using Ionic 2, PouchDB, and Couchbase Sync Gateway to synchronize data across devices. The author explains that while Couchbase Lite is typically used with Ionic for data synchronization, PouchDB offers an alternative approach by directly connecting to Couchbase Sync Gateway, thereby simplifying the setup. The guide outlines the requirements, including Node.js, Ionic Framework, and necessary SDKs, and details the process of creating a simple todo list app. It covers the configuration of Couchbase Sync Gateway, installation of necessary libraries like PouchDB and UUID, and the development of an Angular 2 shared provider for managing database operations. The author emphasizes best practices in Angular 2, such as using a shared provider to maintain a singleton database instance and implementing a two-way sync to handle data changes. The document concludes with instructions on setting up the user interface with Ionic components and testing the application, offering a GitHub repository for reference.