Explore the process of reverse-engineering iOS applications to uncover mobile security risks in this conference talk from OWASP AppSec California 2015. Delve into the challenges of iOS app analysis, including encryption, Objective-C complexities, and the proprietary nature of the operating system. Learn techniques for extracting unencrypted binary code, analyzing ARM disassembly, and identifying common mobile-specific vulnerabilities. Gain insights from real-world examples of security flaws found in App Store applications. Discover tools and methods for automated app grabbing, removing encryption, and performing both static and dynamic analysis. Understand the ARM architecture powering mobile processors and its implications for iOS devices. Follow along as the speaker demonstrates how to spot vulnerabilities through disassembly and user defaults plist examination, providing a comprehensive look at iOS app security auditing.