A former Apple engineer explains why innovation is not about ideas. It is about relief. The Apple Sauce reveals the operating logic behind products that feel inevitable. Paul A. Martinez names the pattern the Law of Perpetual Innovation: where every benefit creates a new burden, which demands the next benefit. Readers learn to detect burden early, trade burdens intelligently, and build systems that resist entropy. The book swaps buzzwords for field notes from design reviews, failure hunts, and reliability labs. You see why the "sauce" the world admires comes from the "stove" no one sees. Key takeaways include: focus on experienced utility, not feature count; measure net perceived utility over time; treat fixes as temporary; and build teams that hunt byproducts before customers do. Practical, short, and direct, this is a handbook for builders who want products to feel smooth, intuitive, and resilient. For founders, entrepreneurs, PMs, engineers, designers, managers and leaders who develop and deploy products, services or systems.This book serves as the condensed sauce to The Infinite Path: The Law of Perpetual Innovation, a heftier reference text with all of the theories, principles and equations needed to drive successful innovation.