Local AI Summarization on iOS with Apple FoundationModels: No Cloud, No Privacy Concerns

Apple’s FoundationModels framework now lets developers run on‑device language models without sending data to external servers. The SystemLanguageModel.default API provides a ready‑to‑use model that can be queried via a LanguageModelSession. Developers can define a Swift struct annotated with @Generable to receive typed, structured output directly from the model, eliminating the need for JSON parsing. The session can be configured with a maximumResponseTokens limit, ensuring predictable response size. Because all processing occurs locally, no vendor account or API key is required, and no user logs are stored. The framework supports generating Markdown summaries, bullet points, and keyword lists in a single request. This approach removes privacy concerns and eliminates the need for a lengthy privacy policy for the feature.