iOS 27 launched this week as a major iPhone update with three standout features. First, Siri AI has been completely rebuilt from the ground up, allowing users to ask anything like Google or ChatGPT and perform more actions across devices, with a dedicated Siri app for conversations. After three months of testing, it has become a daily go-to.

Second, automatic proofreading now includes grammar checking powered by Apple Intelligence. Spellcheck suggests word replacements for correctly spelled but misused words, with grammar issues underlined in blue instead of red, feeling more like optional suggestions. Users can disable this in Settings.

Third, Spotlight search received a major overhaul with Siri integration and a comprehensive, real-time content index for better, more relevant results. The same search foundation upgrades Photos and Mail apps. Early testing shows a noticeable difference in search quality across these key apps.