The latest release of iOS 27 introduces features powered by Apple Intelligence, focusing on reinventing Siri, enhancing user applications, and adding system-wide capabilities. Siri has been rebuilt from scratch using large language models, gaining broad world knowledge, personal context understanding across Messages, Mail, Calendar, Notes, and Reminders, onscreen awareness, app actions such as sending messages and creating calendar events, a dedicated Siri app with conversation history synced via iCloud, enhanced writing features for drafting, editing, and feedback, upgraded visual recognition, and expressive voices adjustable by pace and expressiveness on compatible devices. Beyond Siri, Photos adds Spatial Reframing and a new Clean Up option; Messages introduces Personalized Smart Reply; Calendar and Reminders support natural language descriptions; Mail adds smart suggestions and personalized replies; Safari includes a "Notify Me" feature, natural language extension descriptions, and tab organization by topic; Shortcuts is redesigned for natural language descriptions; Image Playground debuts a revamped app for realistic image generation and wallpaper creation; Files offers intelligent naming suggestions; and Home combines notifications and enhances HomeKit Secure Video with AI-driven search and captions. System-wide features include Automatic Proofreading for spelling and grammar suggestions, Call Context showing relevant information during business calls, and enhanced VoiceOver accessibility capabilities.