This document summarizes how to take Android apps offline via SMS. It discusses how SMS is widely used globally, even in areas without broadband access. It then demonstrates a price comparison app and Twitter app that retrieve data via SMS instead of Wi-Fi. The document explains that an app can send search queries via SMS to a PHP-based SMS wrapper, which then communicates with APIs to retrieve and return the data to the Android app through SMS. It also introduces the txtWeb platform for creating text-based apps that users can access through simple SMS.