AI on Your Smartphone

The story of AI on smartphones is still in its early chapters. The capabilities we will explore in this book — voice assistants, computational photography, health monitoring, generative AI, accessibility features, and all the rest — represent a remarkable achievement, but they are also a foundation rather than a culmination.

The trajectory of AI capability, hardware performance, and design sophistication points toward smartphones that are even more deeply integrated into the fabric of human experience, even more attuned to individual needs and contexts, and even more consequential in their effects on how we live, work, and relate to one another.

Navigating that future well — extracting the genuine benefits while managing the real risks — is the challenge and the opportunity that confronts everyone who carries one of these extraordinary devices.

The smartphone you carry in your pocket has quietly become one of the most sophisticated personal health monitoring devices ever created. What began as a communication tool has evolved into a continuous, unobtrusive window into your body's most vital signs — or tracking movement, detecting anomalies, logging symptoms, and offering insights that were once accessible only through clinical visits and expensive laboratory equipment.

This transformation did not happen overnight. It emerged gradually as hardware grew more capable, machine learning algorithms grew more refined, and the relationship between consumer technology began to blur in ways both exciting and consequential.