Apple iOS 27.3 code reveals Siri personal memory system

According to an IT Home report on November 9, 2026, code researcher pdfu shared a discovery from Apple's iOS 27.3 beta code showing that Apple is developing a personal memory system for Siri. The system is expected to help Siri remember various aspects of a user's life. Found within the iOS 27.3 beta code, the system includes a component called the Memory Graph, designed to organize a user's relationships, frequently visited locations, daily habits, health status, exercise routines, and factors that motivate or hinder the achievement of goals. The system also features data units called Memory Atoms, which are designed to record facts, opinions, intentions, and events while linking them to specific information such as relevant people, locations, times, and topics. According to pdfu, this graph gathers information through two processing mechanisms. One is responsible for converting structured data into insights, such as reading the name field from a user's personal contact card. The other leverages on-device AI models or Private Cloud Compute to extract information from sources including Siri conversations, messages, photos, and health data. At present, only one of these AI-driven information processing mechanisms appears to be present in the code. pdfu believes this mechanism is designed to identify a user's motivations, the obstacles they face, and the resources available to them through a set of built-in questions. The system includes 60 built-in questions. As of now, Apple has not officially announced the system, which is only reflected at the iOS 27.3 beta code level.