Apple has outlined a new approach to improving its AI features by privately analysing user data with the help of synthetic data. The move follows criticism of the company's AI products, especially notification summaries, which have underperformed compared to competitors.

The new method relies on 'differential privacy,' where Apple generates synthetic messages that resemble real user data without containing any actual content.

These messages are used to create embeddings-abstract representations of message characteristics-which are then compared with real emails on user' devices that have opted in to share analytics.

Devices send back signals indicating which synthetic data most closely matches real content, without sharing the actual messages with Apple.

Apple said the technique is already being used to improve its Genmoji models and will soon be applied to other features, including Image Playground, Image Wand, Memories Creation, Writing Tools, and Visual Intelligence.

The company also confirmed plans to improve email summaries using the same privacy-focused method, aiming to refine its AI tools while maintaining a strong commitment to user data protection.

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