This document discusses sustainable trends for developing mobile web apps. It outlines three types of mobile apps - native, hybrid, and web - and argues that web apps have advantages like a single codebase, maximum device reach, and instant deployment. It then presents proven techniques for modern web apps, including responsive web design, templates, observable objects, data synchronization, and components. These techniques are designed to inspire using approaches that separate data and presentation, allow for different devices, enable loose coupling, and promote reusability. The document advocates for these techniques as preparing for emerging web standards.