[Digital Today reporter Jinju Hong (홍진주)] Apple has made major changes to Siri AI, autocorrect and search in iOS 27, strengthening everyday iPhone usability, IT outlet 9to5Mac reported on Sept. 16 local time.

Changes likely to be used frequently in the update include a new Siri, autocorrect that includes grammar, and an overhaul of Spotlight-based search.

The biggest change is Siri. Apple said it has redesigned Siri at a level that goes beyond bolstering a few functions. Users can now ask Siri a much wider range of questions and get more specific answers.

Siri's role has also expanded. The number of tasks it can perform on iPhone has increased sharply, and it has been changed to work consistently in the same way across multiple devices. A dedicated Siri app that collects conversations has also been added. The outlet also reported that after using the new Siri for about 3 months, it became the feature it turned to most often in daily life.

Writing correction has also changed. The iPhone previously offered spellcheck, but iOS 27 expands the scope of correction based on Apple Intelligence. Beyond simply flagging typos, it suggests replacement words that fit the context and separately checks for grammar errors.

The way issues are displayed has also changed. Existing spelling errors remain underlined in red, while word replacement suggestions and grammar issues are distinguished with blue underlines. Apple designed the difference so grammar or wording changes feel like optional suggestions rather than strong warnings. Users can turn off correction features in settings if they do not want them.

A search overhaul also stands out. Spotlight has been rebuilt in iOS 27, and integration with Siri has been strengthened. Systemwide iPhone search has been redesigned to index a wider range of content on the device, and the index is configured to stay up to date throughout the day.

The core change is improved accuracy and relevance in search results. Apple said its new search foundation technology has been applied not only to Spotlight but also to Photos and the Mail app. That means it has made it easier to find desired items in Photos and Mail based on a more comprehensive index that stays updated throughout the day. The original author also assessed that the difference from before was clearly felt during testing.

This update focuses on making existing core functions used more often than on flashy new apps. Siri expanded into a conversational interface, writing correction broadened from catching mistakes to refining expressions, and search was reconfigured to improve navigation efficiency across the system. Early reactions to iOS 27 are therefore likely to depend less on the number of new features and more on how naturally iPhone usage flows have changed.