How this review was made: it is based on Apple’s published specifications and on tests published by other reviewers, listed at the end. It is not a long-term personal test, and where a claim comes from one reviewer, I say so.

iOS updates have a pattern. There is one headline feature, a long list of small ones, and a slow realisation over the following months about which of them you actually use. iOS 27, released on 14 September 2026, follows that pattern more strongly than most. The headline is a rebuilt Siri. The surprise is how much of the rest is simply good housekeeping.

Siri, at last

Siri AI is a generative rebuild. It can hold a real back-and-forth conversation, search your personal data across apps, look things up on the web, see what is on your screen and take actions inside apps. It lives in the Dynamic Island, and a new Siri app keeps your past conversations. The new Search or Ask interface replaces Spotlight.

TechCrunch’s Ivan Mehta offers the most useful endorsement, simply by saying he has started using Siri again. His examples are small and practical: drafting a return request from delivery details spread across messages and email, or looking up a startup’s funding from its website. He also found limits. Getting Siri to place something in the right note took some effort, and it is still unclear how smoothly it will work with third-party apps until developers update them.

The important caveats are about access. Siri AI needs an iPhone 15 Pro or newer. It is labelled as a beta, works in English in certain regions, is not initially available in the EU, and is not available in China. Before you get excited, check that your phone and your region are covered, particularly if you are outside the main launch markets.

Liquid Glass, with a dial

Last year’s Liquid Glass design was divisive, largely because of legibility. iOS 27 gives you a slider running from clear to opaque and tinted. Busy content behind bars and menus is also diffused better, with stronger separation at the edges. Admitting that one setting cannot suit everyone is a mature move, and I wish it had been there from the start.

The quiet improvements

Some of the best parts of iOS 27 are easy to miss:

  • Shortcuts can be created by describing what you want in plain language, which finally opens them to people who never learned to build one.
  • Safari groups tabs by topic and can alert you when a page changes, such as a price or a policy.
  • Passwords can use Safari to change weak or compromised passwords for you.
  • Photos gains improved Clean Up, plus Extend and Reframe. Mehta found the eraser better, and Extend and Reframe less reliable.
  • Parental controls gain schedules, time limits and remote approval for new websites.

Apple also claims speed gains, including apps launching up to 30 percent faster and AirDrop transfers up to 80 percent faster. I would treat those as best-case figures. Better Wi-Fi to mobile data handoff may be the improvement you notice most in daily use.

Who gets what

This is an unusually split release. iOS 27 runs on every device that supported iOS 26, going back to the iPhone 11, so older phones get the housekeeping and the design changes. The headline AI features stop at the iPhone 15 Pro, and a few features need newer hardware still. An older phone gets a tidier iPhone, not a transformed one.

Should you install it?

Yes, and security is the main reason. Point releases have followed quickly: iOS 27.0.1 fixed a Face ID bug, and iOS 27.2 addressed more than 160 security vulnerabilities. Staying on the older version is not a neutral choice. Just keep your expectations in proportion. Siri AI is the best version of Siri there has ever been, and it is still a beta that will sometimes misfire.

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