The App Store now offers review summaries in iOS 18.4, providing a high-level overview of user reviews while allowing for detailed exploration. This feature is powered by a multi-step LLM-based system that periodically summarizes user reviews. The aim is to ensure these summaries are inclusive, balanced, and accurately reflect the user’s voice, prioritizing safety, fairness, truthfulness, and helpfulness. This feature is a significant improvement over previous versions. Summarizing crowd-sourced user reviews presents several challenges, each of which we addressed to deliver accurate, high-quality summaries that are useful for users: Timeliness: App reviews change constantly due to new releases, features, and bug fixes. Summaries must dynamically adapt to stay relevant and reflect the most up-to-date user feedback. Diversity: Reviews vary in length, style, and informativeness. Summaries need to capture this diversity to provide both detailed and high-level insights without losing nuance. Accuracy: Not all reviews are specifically focused on an app’s experience and some can include off-topic comments. Summaries need to filter out noise to produce trustworthy summaries.