Psych LM: On-Device AI for Psychological Coaching

A new research paper introduces Psych LM, an iOS application that uses a local, on-device language model for behavioral and life-coaching. The system employs a retrieval-augmented generation architecture with an automated memory corpus that converts conversations into structured memory cards (facts, goals, events) and injects them via semantic and vector search, achieving a near-infinite context window. The paper argues that for emotionally oriented support, the surrounding architecture is more critical than the model itself. Psych LM runs within a purpose-built, local-first runtime designed for privacy and persistent context across sessions. The system is defined as an active-learning, retrieval-augmented generative, on-device architecture. The paper is published on arXiv under ID 2605.24411.