Short answer: Apple Intelligence requires an iPhone 15 Pro, iPhone 15 Pro Max, or any iPhone 16 model or later. The standard iPhone 15 and iPhone 15 Plus are excluded, permanently — no update will add support. The most advanced on-device Siri features narrow further still, to the iPhone 17 Pro, 17 Pro Max and iPhone Air.
Whether that matters to you is a separate question, and worth answering honestly before you spend money on it.
The three tiers
| Tier | Devices | What you get |
|---|---|---|
| Everything | iPhone 17 Pro, 17 Pro Max, iPhone Air | Full Apple Intelligence plus the most advanced on-device Siri model |
| Standard | iPhone 16, 16 Plus, 16 Pro, 16 Pro Max, 16e, iPhone 15 Pro, 15 Pro Max | Apple Intelligence and the redesigned Siri |
| None | iPhone 15, 15 Plus, and everything down to iPhone 11 | iOS 27 without Apple Intelligence |
The line that surprises people sits inside a single generation. The iPhone 15 Pro qualifies. The iPhone 15 does not. Same year, same name, different chip and memory, different answer.
Why the cut-off is where it is
These features run on the device rather than in the cloud, which is the point of them — your data does not leave the phone. That requires a neural engine of a certain capability and, critically, enough RAM to hold a language model in memory alongside everything else you are doing.
Older chips cannot do it, and this is a hardware boundary rather than an artificial one. Apple could not enable it on an iPhone 14 with a software update even if it wanted to.
The practical implication for buyers: this will never change. If Apple Intelligence matters to you, the device must qualify on the day you buy it.
What you actually miss
Being specific is more useful than a feature list.
Writing tools rewrite, proofread and summarise text inside any app. Notification summaries condense a pile of alerts into a line. The redesigned Siri understands onscreen context and personal context, and can carry out actions inside apps rather than handing you a web search. Photo tools include object removal and newer editing features like Extend and Spatial Reframing. Genmoji and Image Playground generate images and custom emoji.
Underneath all of it, Apple has been broadening the platform — including a deal to power parts of Apple Intelligence using Google's Gemini technology, and a planned option to choose which model drives Siri and the writing tools.
Will you miss it? Be honest with yourself
This is the part most buying guides avoid, so here is a straight answer.
You will probably miss it if you write a lot on your phone, live in your notifications, or already use AI tools daily on other devices. Writing tools and notification summaries are the two features people report actually changing their routine.
You probably will not if your phone is for messaging, calls, camera, navigation, payments and social media. A large share of people who own capable devices have never deliberately opened an Apple Intelligence feature. Paying a premium for capability you will not use is the same mistake as paying for megapixels you will not use.
There is a middle position worth considering: if you keep phones four or five years, the features will keep expanding over that period, and a device that cannot run any of them may feel dated sooner — even if you do not want them today.
What this means for a renewed purchase
Two clean routes.
If you want Apple Intelligence, the cheapest way in is a renewed iPhone 15 Pro or an iPhone 16e. Both qualify. The 16e is the newer device; the 15 Pro brings the better display and camera system.
If you do not, ignore the boundary entirely and buy on hardware. A renewed iPhone 14 Pro Max gives you a far better camera and display than an entry-level device that happens to qualify for AI features you will not open. That is a genuinely defensible choice, not a compromise.
Related: iPhone 15 vs iPhone 16 · iOS 27 supported iPhones · Browse Premium Renewed iPhones
Frequently asked questions
Which iPhones support Apple Intelligence?
iPhone 15 Pro, iPhone 15 Pro Max, and every iPhone 16 model or later including the iPhone 16e. The standard iPhone 15 and iPhone 15 Plus are not supported.
Does the iPhone 15 support Apple Intelligence?
No. The standard iPhone 15 and iPhone 15 Plus lack the required chip and memory. Only the iPhone 15 Pro and Pro Max from that generation qualify, and no software update will change this.
Can Apple add Apple Intelligence to older iPhones later?
No. The features run on-device and require a neural engine and memory capacity that older chips do not have. It is a hardware limitation rather than a software choice.
What is the cheapest iPhone with Apple Intelligence?
Renewed, the iPhone 15 Pro or iPhone 16e are the most affordable qualifying devices. The 16e is newer; the 15 Pro has the stronger display and camera system.
Which iPhones get the most advanced Siri features?
Only the iPhone 17 Pro, iPhone 17 Pro Max and iPhone Air run Apple's most powerful on-device model, which enables the full set of new Siri capabilities.
Is Apple Intelligence worth upgrading for?
It depends on use. Writing tools and notification summaries genuinely change routines for people who write a lot on their phone. For messaging, camera, navigation and social media use, the features often go unopened.
