This document discusses developing mobile apps using Appcelerator Titanium. It is an open source development environment that allows creating native apps across different mobile operating systems using one JavaScript code base. This reduces development time by 20-60% and allows for 50-60% less code due to code reusability between platforms. The document also provides tips for planning a mobile app project, including agreeing on goals, understanding users, user testing, identifying core features, planning releases, balancing business needs, knowing competitors, involving IT early, choosing technology, and analyzing data. It concludes by thanking the reader in multiple languages.