On the morning of 8 June 2026, a developer in a crowded auditorium in Cupertino did what tens of thousands of others did that same hour: opened the Settings app, tapped through to Software Update, and watched the first iOS 27 developer beta begin to download onto a test iPhone before the keynote applause had even faded. Five weeks later, on 13 July, the same build reached the public beta program, and ordinary iPhone owners started poking at a rebuilt Siri and a smarter Photos app on their own phones. Neither group was using finished software. That gap — between a polished stage demo, a rough beta, and the stable release still months away — is exactly what this timeline is built to track. iOS 27 is not one moment. It is a sequence, and where you are in that sequence changes what is real and what is still a promise. This page follows that sequence from the earliest iPhone software of 2007 to the September launch Apple is steering toward, keeping a firm line between what has already shipped and what is still coming.
iOS 27 is the 2026 major release of Apple’s iPhone operating system, unveiled at the WWDC keynote on 8 June 2026 and headlined by a rebuilt, Apple Intelligence-powered assistant Apple calls Siri AI. Developer betas began the same day; the first public beta arrived on 13 July 2026; the free stable release is expected in September, in Apple’s usual window alongside new iPhones.
iOS 27 keeps the Liquid Glass look introduced in iOS 26, refined for readability, and supports the same devices — iPhone 11 and newer. Its headline artificial intelligence features, however, require newer silicon: Apple Intelligence needs an A17 Pro chip or later with 8GB of memory, meaning iPhone 15 Pro and newer. Until the stable build ships, everything running today is pre-release beta software and can still change.
Fast-moving items, kept separate from the historical timeline. Last updated 19 July 2026.
Where the rollout stands. As of mid-July 2026, iOS 27 exists only as beta software. Apple seeded the first developer beta on 8 June, a second on 22 June and a third on 6 July, then opened the first public beta on 13 July 2026 (build 24A5380l). These builds are for testing, not daily reliance: Apple explicitly warns that betas can contain bugs, drain battery faster and break third-party apps.
What is confirmed versus still coming. The features Apple demonstrated on stage — Siri AI, Spatial Reframing in Photos, Safari’s Notify Me, expanded parental controls, and the second-generation Foundation Models framework — are officially announced and appearing in betas in staged form. Siri AI itself is being rolled out gradually: Apple has said the new assistant begins in beta later in 2026 for English first, and that some Apple Intelligence features will not be available at launch in the European Union and China. The release candidate and the stable public build have not shipped. Point releases such as iOS 27.1 and 27.2 do not exist yet and are expected in the months after launch.
How to read reports right now. Anything you read about a specific launch day, an exact iOS 27.1 date, or a feature arriving on older iPhones should be treated as expectation or reporting, not confirmed fact, until Apple publishes it. This page will be updated as each build ships.
The features, the AI strategy and the plumbing underneath, in plain terms.
Every iOS release is really three things at once: a set of visible features, a platform shift for developers, and a statement about where Apple is heading. iOS 27 leans hard into the third. After introducing Apple Intelligence in the iOS 18 cycle and shipping the Liquid Glass redesign in iOS 26, Apple used WWDC 2026 to argue that its on-device artificial intelligence is finally ready to do useful, everyday work rather than party tricks. Whether it delivers on that is a question only real-world use over the coming year can answer — which is precisely why a timeline, updated as builds ship, is more honest than a launch-day feature list.
The centrepiece is Siri AI, described by Apple as an entirely new version of Siri deeply integrated across iPhone, iPad, Mac, Apple Watch and Vision Pro. In Apple’s own framing it can answer questions about what is on your screen, draw on personal context to search across your messages, emails and photos, and reach for up-to-date world knowledge, with a dedicated Siri app that keeps a conversation history synced through iCloud. In practice, that pushes Siri closer to the chatbot-style assistants people now expect. Apple has been candid that this is a phased rollout: the new Siri experience begins in beta later in 2026, in English first, rather than arriving complete on day one.
Apple’s pitch rests on doing as much as possible on the device. Many Apple Intelligence requests run against models stored on the iPhone itself, so the data never leaves your hand. When a task needs more power, Apple routes it to Private Cloud Compute, servers running Apple silicon that are designed so that even Apple cannot see your data, with independent inspection of the software images. That split — small and private on-device, larger and still-private in the cloud — is the core of how Apple markets iOS 27 against rivals. It is also why the AI features are gated to newer chips: the on-device models need the memory and neural-engine headroom that only recent iPhones have.
The most consequential change for the app ecosystem is the second year of the Foundation Models framework. It is a native Swift API that gives apps direct access to the same on-device model that powers Apple Intelligence, and in its 2026 form it broadens to let apps work with other language models too, including cloud models, through a common protocol. Multimodal prompts let an app pass images alongside text, and on-device tools such as text recognition can be called by the model directly. Alongside it, Apple introduced a lower-level framework for loading and running custom AI models on Apple silicon entirely on-device, and Xcode 27 gained predictive, multi-line code completion powered by an on-device model, plus optional integration with coding agents from third parties. For developers, iOS 27 is less about one feature and more about AI becoming a standard building block.
Beyond the assistant, iOS 27 spreads intelligence through the built-in apps. Photos adds Spatial Reframing, which can improve a shot’s composition after it was taken, alongside cleanup and extend tools; Image Playground can now generate images in a photorealistic style. Safari can organise tabs by topic and, with a Notify Me feature, watch a web page for changes such as a restock or a price drop. Messages and Mail can read the context of a thread and suggest one-tap responses, and Messages no longer stalls a text while a large attachment sends. The Passwords app gains the ability to help replace weak or breached logins, FaceTime can capture from front and rear cameras at once, and parental controls expand with age-based protections, per-category time allowances and stronger communication-safety filtering.
It is worth being clear-eyed about the parts that always get tested last. Early betas commonly run hotter and shorter on battery than the finished release, because debugging code is left switched on; judging iOS 27’s battery life from a July beta is premature. Each release also folds in a large batch of security fixes, which is a genuine reason to update once the stable build ships. On compatibility, iOS 27 holds the line at iPhone 11 and newer, the same devices supported by iOS 26 — so no iPhone loses support this year — but the artificial-intelligence features are a separate tier that only newer hardware unlocks. That two-speed reality, one iOS for everyone and a faster iOS for recent Pro-class phones, is the defining shape of this release.
iOS 27 is only the second release under Apple’s year-based naming. The jump from iOS 18 in 2024 straight to iOS 26 in 2025 was not a skipped count but a deliberate move to align every Apple platform — iOS, iPadOS, macOS, watchOS and the rest — to the year most people would use it. By that logic, iOS 27 is the 2026 edition, arriving in 2026 and living mostly through 2026 and 2027.
The iOS 27 release schedule at a glance. Dates for unreleased builds are Apple’s expected windows, not confirmed dates.
| Date | Release / Build | Why it matters |
|---|---|---|
| 8 Jun 2026 | WWDC keynote + Developer Beta 1 (24A5355q) | iOS 27 unveiled; Siri AI and developer tools shown; first beta seeded |
| 22 Jun 2026 | Developer Beta 2 (24A5370h) | Early bug fixes and refinements for registered developers |
| 6 Jul 2026 | Developer Beta 3 (24A5380h) | Stabilising ahead of the public beta |
| 13 Jul 2026 | Public Beta 1 (24A5380l) | First build open to everyone through the free beta program |
| Early Sep 2026 | Release Candidate (expected) | Near-final build for last testing before launch |
| Mid-Sep 2026 | Stable public release (expected) | Free update for all compatible iPhones, alongside new iPhones |
| Late 2026 | iOS 27.1, 27.2 (expected) | Point updates: staged features, regional rollouts and bug fixes |
Newest first, from the 2026 roadmap back to the first iPhone software of 2007.
What is expected. Following Apple’s pattern, the first point updates should arrive in the months after the September launch. These typically switch on features that were announced but not ready at day one, expand Apple Intelligence to more languages and regions, and clear the bugs that surface once millions of people install the software.
Why it matters. Point releases are where a modern iOS actually finishes. Several headline features in recent cycles landed weeks or months after launch through updates like these, which is why treating the September build as the final word is a mistake.
What is expected. Apple has shipped its major iOS update in the second week of September for years, as a free download tied to the launch of new iPhones. iOS 27’s stable release is expected in that same window, though Apple has not published an exact date.
User impact. On release day, every compatible iPhone from the iPhone 11 up can install iOS 27 through Software Update. The advice that holds every year applies: back up first, and there is rarely harm in waiting a few days for early reports.
What is expected. A release candidate, or RC, is the near-final build Apple seeds roughly a week before launch. Barring a last-minute bug, the RC is what ships to the public. Developers use it to submit apps built against the final software.
Developer impact. The RC is the signal to developers that the APIs are locked. It is the first point at which testing against iOS 27 reflects what real users will run, rather than a moving target.
What happened. Apple released the first iOS 27 public beta through the free Apple Beta Software Program, giving anyone with a compatible iPhone a supervised way to try the software before launch. It closely tracked the third developer beta.
User impact. Millions of non-developers got their first hands-on with the refined Liquid Glass interface, the new Photos tools and early Siri AI behaviour. Apple’s standing guidance applies: install it on a secondary device, since beta software can misbehave and third-party apps may not be ready.
What happened. The third developer beta continued the steady cadence of fixes and tuning, and served as the base that the public beta was cut from a week later. Each beta in this phase chips away at bugs and adjusts features seen in the keynote.
Developer impact. Developers used this build to keep testing apps against new frameworks and to file feedback while there was still time for Apple to act on it before the software locked down.
What happened. Two weeks after the keynote, Apple issued the second developer beta, the first proper round of refinement after the initial reveal build. Behaviour that was rough in beta 1 began to settle.
Developer impact. This is typically when developers start to trust the new APIs enough to build against them in earnest, having seen how much shifted from the very first seed.
What happened. Apple opened its Worldwide Developers Conference on 8 June 2026 and unveiled iOS 27 alongside the next generation of Apple Intelligence and Siri AI. The first developer beta was released the same day, and Apple set the public beta for July and general availability for the autumn.
Technical changes. The keynote introduced Siri AI, Spatial Reframing in Photos, Safari’s Notify Me, expanded parental controls, and a wave of developer tooling led by the second-generation Foundation Models framework and Xcode 27’s on-device code completion.
Why it matters. WWDC is the moment the year’s software direction is set. Everything after it — every beta, the RC, the launch — is execution against what Apple committed to on this stage.
What happened. iOS 26, announced at WWDC in June 2025 and released on 15 September 2025, brought Liquid Glass, the biggest interface redesign since iOS 7, and adopted the year-based version number in place of what would have been iOS 19.
Current relevance. iOS 27 inherits and refines Liquid Glass rather than replacing it, and keeps the same supported-device list. iOS 26 also drew criticism over readability, performance and battery, which helps explain why iOS 27’s design work is framed around polish rather than reinvention.
What happened. iOS 18, released in 2024, was the release where Apple entered the generative-AI era with Apple Intelligence: writing tools, image generation and a first attempt at a more capable Siri, rolled out in stages over the following months.
Current relevance. That staged, sometimes-delayed rollout set expectations for iOS 27. The more ambitious Siri promised in the iOS 18 era is, in effect, what iOS 27’s Siri AI is meant to finally deliver.
What happened. iOS 14 brought Home Screen widgets, the App Library and picture-in-picture, opening a wave of personalisation that iOS 16’s Lock Screen and iOS 17’s StandBy and Live Activities extended over the following years.
Current relevance. Widgets and Live Activities remain core surfaces in iOS 27, and they are increasingly where Apple Intelligence surfaces glanceable, contextual information.
What happened. iOS 7 replaced the skeuomorphic look of early iOS with a flat, translucent design language that defined the platform for more than a decade — the reference point critics reached for when Liquid Glass arrived.
Current relevance. iOS 26’s Liquid Glass was explicitly described as the first redesign on the scale of iOS 7, and iOS 27 continues that lineage of translucency and depth.
What happened. iOS 5 launched Siri, iMessage, Notification Center and iCloud, cutting the iPhone free from a computer for setup and updates. Siri arrived as a voice assistant that felt futuristic and then, for years, stood still.
Current relevance. The through-line from 2011 to 2026 is Siri’s reinvention. iOS 27’s Siri AI is the most significant change to the assistant since it first appeared, fifteen years earlier.
What happened. iPhone OS 2 opened the App Store and the software development kit, turning the iPhone from a device into a platform and creating an app economy that now spans millions of apps and countless developers.
Current relevance. Every iOS 27 developer story — Foundation Models, Xcode 27, new APIs — descends from the moment third parties were first invited in. The App Store is also where regulation now reshapes Apple’s rules year by year.
What happened. The original iPhone shipped in June 2007 with the software later called iOS. There was no App Store, no copy and paste and no third-party apps — just a multi-touch interface that reset expectations for what a phone could be.
Current relevance. Nearly two decades and twenty-plus major releases later, iOS 27 still traces to that first build. The arc from a locked-down 2007 system to an AI platform in 2026 is the story this timeline tells.
The API that will change the most apps in the iOS 27 era is the Foundation Models framework. In its second year it stops being a narrow hook into Apple’s own model and becomes a general way to run language models — on-device, multimodal, and able to call system tools — with cloud models reachable through the same protocol. Paired with on-device code completion in Xcode 27, it lowers the cost of adding intelligent features to the point where AI becomes a default, not a special project. The catch: those on-device capabilities only exist on iPhones new enough to run the models.
The fixed sequence every major iOS follows, from reveal to point updates.
At its June conference Apple announces the new iOS and seeds the first developer beta the same day, through the paid Apple Developer Program. This build is rough and meant for testing new APIs, not daily use.
Over the summer Apple issues successive developer betas, usually every couple of weeks, fixing bugs and refining features shown at the keynote. Behaviour can change meaningfully from one beta to the next.
In July Apple opens the free Apple Beta Software Program so anyone can try a supervised build. It is more stable than early developer betas but still unfinished, and best kept off a primary device.
About a week before launch Apple seeds a near-final release candidate. APIs are locked, and barring a serious bug this is the build that ships to the public.
In September the free stable version reaches all compatible iPhones. Point updates such as iOS 27.1 and 27.2 then follow over the months after, adding staged features, expanding regions and fixing bugs.
Meaningful user changes, not marketing language. Publicly documented capabilities only.
| Area | iOS 26 (2025) | iOS 27 (2026) |
|---|---|---|
| Assistant | Apple Intelligence Siri, staged and limited | Siri AI: rebuilt, on-screen aware, personal-context search |
| Design | Liquid Glass introduced, readability criticised | Liquid Glass refined for readability; new battery icon |
| Photos | Cleanup and AI editing tools | Adds Spatial Reframing to fix composition after capture |
| Safari | Standard tabs and profiles | Tab organisation by topic; Notify Me page monitoring |
| Developer AI | Foundation Models framework, first year | Foundation Models year two: multimodal, third-party models |
| Parental controls | Screen Time and content limits | Age-based setup, per-category time allowances, safer sharing |
| Supported iPhones | iPhone 11 and newer | iPhone 11 and newer (unchanged) |
Which iPhones get iOS 27, and which get the AI features. Based on Apple’s stated chip and memory requirements.
| Capability | iPhone 11–15, 16e base (A13–A16) | iPhone 15 Pro, 16, 16e (A17 Pro–A18, 8GB) | iPhone 17, 17 Pro, Air (A19, up to 12GB) |
|---|---|---|---|
| Core iOS 27 features | Yes | Yes | Yes |
| Liquid Glass design | Yes | Yes | Yes |
| Apple Intelligence (writing, image tools) | No | Yes | Yes |
| Siri AI (rebuilt assistant) | No | Yes | Yes |
| Heaviest on-device models | No | Partial | Yes |
Note: iPhone 15 base and iPhone 16e use different chips; Apple Intelligence requires an A17 Pro or newer with 8GB of memory. Exact per-model support should be checked against Apple’s official specifications.
A neutral comparison of publicly documented capabilities, not a verdict.
| Capability | iOS 27 (Apple) | Android 2026 flagships |
|---|---|---|
| On-device AI | Foundation Models and on-device Apple Intelligence | Gemini Nano via on-device runtimes |
| Assistant | Siri AI, rebuilt on Apple Intelligence | Gemini as the default assistant |
| Private cloud AI | Private Cloud Compute on Apple silicon | Vendor cloud services (Google and OEMs) |
| App distribution | App Store; alternative marketplaces in the EU | Play Store plus broad sideloading |
| Update model | Single vendor, long support on all eligible iPhones | OEM-dependent; up to 7 years on leading phones |
| Image generation | Image Playground, photorealistic style | Vendor tools such as on-device image generators |
For most people, the features you will notice first are not the ones that led the keynote. A rebuilt Siri that understands what is on your screen, Photos that can straighten and reframe a shot you already took, and Safari quietly telling you a product is back in stock are the small, daily wins. The heavier artificial-intelligence promises take longer to prove themselves — and only on an iPhone new enough to run them. If your phone is an iPhone 14 or older, you will still get iOS 27, just without the Apple Intelligence layer.
Many iOS features that headline a June keynote do not actually ship in the first stable release. They arrive later, through point updates such as iOS 27.1 or 27.2, sometimes months after launch and often region by region. It is why the version number on your iPhone in December can offer noticeably more than the one that shipped in September — and why a timeline that keeps updating is more useful than a single launch-day list.
The people, products and technologies that define this release.
Apple’s system of on-device and Private Cloud Compute AI models. iOS 27 delivers its next generation, powering Siri AI and app features, gated to iPhones with an A17 Pro chip or newer and 8GB of memory.
The rebuilt assistant at the centre of iOS 27, with on-screen awareness, personal-context search across your apps, world knowledge and a dedicated Siri app that syncs history via iCloud. It rolls out in stages, English first.
The native Swift API giving apps direct access to on-device models. In its 2026 second year it adds multimodal prompts and reaches beyond Apple’s own model to other language models through a shared protocol.
The translucent interface introduced in iOS 26, the biggest redesign since iOS 7. iOS 27 refines it for readability rather than replacing it, and adds touches such as a new battery icon.
Apple’s Worldwide Developers Conference, whose keynote on 8 June 2026 unveiled iOS 27, Siri AI and the developer tools. It is the origin point of the entire release cycle that follows.
Apple’s development environment, updated with predictive on-device code completion and optional third-party coding agents, letting developers build for iOS 27 and adopt its new AI frameworks.
The evolution of iOS is driven as much by security, accessibility and developer tools as by the features that make headlines. iOS 27’s lasting significance may not be Siri AI on launch day but the quieter shift of on-device intelligence into a standard developer building block, delivered on the same predictable September cadence Apple has run for nearly two decades.
Related histories from AiTimeline.
Officially, the roadmap is clear: a release candidate, the September stable launch, and staged point updates that will widen Siri AI to more languages and bring Apple Intelligence to the European Union and China over time. As analysis rather than confirmation, the questions that will decide iOS 27’s reputation are whether the rebuilt Siri actually feels reliable in daily use, how the AI features hold up on battery, and how fast Apple closes the gap between the features shown in June and the ones that ship by year’s end.
Thirty-five answers on iOS 27, its features, betas, compatibility and release.
Stripped of the keynote gloss, iOS 27 is a continuation, not a rupture. It keeps the Liquid Glass design of iOS 26, keeps the same supported iPhones, and keeps the predictable September rhythm Apple has run since the iPhone was young. What makes it consequential is the direction it commits to: on-device artificial intelligence woven through the assistant, the built-in apps and, crucially, the tools developers use to build everything else. Siri AI is the face of that bet, but the deeper change is the Foundation Models framework quietly making intelligence a standard ingredient in third-party apps.
It is worth holding two truths at once. iOS 27’s privacy architecture, developer frameworks and ecosystem reach are real and already documented; its practical value is not yet proven. A feature demonstrated on a stage in June is a promise, a rough edge in a July beta is a work in progress, and only the stable release and the months of point updates that follow will show whether the rebuilt Siri is dependable, whether the AI earns its battery cost, and whether the features that shipped match the ones that were shown. Device compatibility draws a hard line through all of it: the fullest iOS 27 belongs to recent iPhones, while older ones get a capable but quieter version of the same release.
That is the honest way to read any modern iOS. Its worth is decided not by the announcement but by how it behaves in ordinary hands over an ordinary year — which is exactly why this page is built as a timeline that keeps updating, rather than a verdict fixed on launch day. Check back as each build ships, and the picture of what iOS 27 truly is will get clearer with it.