Apple’s compatible device list includes iPhone 11 through the listed iPhone 18 Pro models, iPhone Air, and iPhone SE (2nd and 3rd generation). That makes your phone eligible for the OS—not every feature.
See the supported iPhones +
iPhone 18
iPhone 18 Pro · iPhone 18 Pro Max
iPhone 17 & Air
iPhone 17 · iPhone 17 Pro · iPhone 17 Pro Max · iPhone 17e · iPhone Air
iPhone 16
iPhone 16 · iPhone 16 Plus · iPhone 16 Pro · iPhone 16 Pro Max · iPhone 16e
iPhone 15
iPhone 15 · iPhone 15 Plus · iPhone 15 Pro · iPhone 15 Pro Max
iPhone 14
iPhone 14 · iPhone 14 Plus · iPhone 14 Pro · iPhone 14 Pro Max
iPhone 13
iPhone 13 mini · iPhone 13 · iPhone 13 Pro · iPhone 13 Pro Max
iPhone 12
iPhone 12 mini · iPhone 12 · iPhone 12 Pro · iPhone 12 Pro Max
iPhone 11
iPhone 11 · iPhone 11 Pro · iPhone 11 Pro Max
iPhone SE
iPhone SE (3rd generation) · iPhone SE (2nd generation)
02 / THE INTELLIGENT FEATURES
Can it use Apple Intelligence?
Apple Intelligence needs iPhone 15 Pro or Pro Max, iPhone 16 models or later, or iPhone Air. Updating an older compatible iPhone won’t add AI hardware support.
iLanguage, region, and feature rollout also matter. Siri AI availability is separate from hardware eligibility.
Save a recent copy of your data and check that the backup finished successfully.
02
Leave some room.
Check your available storage and follow the space requested in Software Update.
03
Check your essentials.
Confirm the apps you depend on support iOS 27, especially on your main phone.
04
Pick a good moment.
Allow time for installation, connect to power, and keep important information accessible.
How your readiness summary is calculated+
We first check your model against Apple’s compatible-device list. For compatible phones, we consider battery health, storage headroom, backup status, critical use of your primary phone, and whether your AI expectations match the hardware. Lower battery health, very low storage, a missing backup, or an AI mismatch can prompt “Review a few things first.” Smaller considerations can add up. Unknown battery health is never treated as a measured battery problem.
Battery and storage thresholds are transparent product guidance, not Apple requirements. These rules are not an official safety score, battery diagnosis, or prediction of future performance.
A LITTLE MORE CLARITY
Good questions. Practical answers.
What to know before making your next move.
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Which iPhones support iOS 27?+
Apple’s iOS 27 user guide lists: iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone 12 mini, iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 13 mini, iPhone 13, iPhone 13 Pro, iPhone 13 Pro Max, iPhone 14, iPhone 14 Plus, iPhone 14 Pro, iPhone 14 Pro Max, iPhone 15, iPhone 15 Plus, iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 16e, iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone 17e, iPhone Air, iPhone 18 Pro, iPhone 18 Pro Max, iPhone SE (2nd generation), iPhone SE (3rd generation). Check Apple’s current documentation for changes; feature availability varies by model.
Does every iOS 27 iPhone support Apple Intelligence?+
No. iOS 27 compatibility and Apple Intelligence compatibility are separate. Apple Intelligence requires iPhone 15 Pro, iPhone 15 Pro Max, iPhone 16 models or later, or iPhone Air. It is not supported on iPhone 15, iPhone 15 Plus, or earlier models in this checker.
Should I update to iOS 27 immediately?+
The timing depends on device compatibility, your backup, free storage, battery condition, essential apps, and the features you want. If you rely on your primary phone for critical tasks, confirm app compatibility and choose a convenient installation window. There is no one-size-fits-all recommendation to install immediately or wait for a particular release.
How much free storage do I need for iOS 27?+
Apple does not provide one universal free-space number that applies to every iPhone. Actual update storage requirements vary by device and installation method. Follow the space requested in Software Update. Our bands—under 5 GB, 5 to under 10 GB, 10 to under 20 GB, and 20 GB or more—describe headroom, not official installation requirements. Apple Intelligence downloads may need additional space.
Will iOS 27 reduce my battery life?+
Battery behavior can vary by device, battery condition, background indexing, apps, and usage. Battery health alone cannot predict the effect of an update. This checker highlights things to consider; it does not diagnose your battery or promise a particular battery-life outcome.
Does iOS 27 include Apple Intelligence and Siri AI?+
Yes, on supported devices, subject to feature, language, region, and rollout availability. Apple Intelligence hardware eligibility does not guarantee that every feature is immediately available. Apple describes Siri AI as a beta rolling out in English; consult the Siri AI support page for its specific requirements.
Should I back up before updating?+
Yes. Back up your iPhone before installing a major iOS update and confirm that the backup completed successfully. If you are unsure when your last backup ran, check its timestamp in Settings or create a new backup. Apple’s official guide is linked below.
How does this update checker use my information?+
The readiness calculation runs in your browser. We do not scan your device, access your Apple account, or store your form answers. Cloudflare measures site visits. When enabled, Umami Cloud measures pageviews, checker interactions, and result categories without sending your answers or using tracking cookies. Umami processes browser/device information and approximate location; its documentation says request IP addresses are used for location and never stored. We limit page URLs to the homepage and referrers to their origin. The free plan retains analytics for up to six months. Checker event analytics respects Do Not Track and Global Privacy Control.
The checker uses Apple Support’s iOS 27 user-guide list. Apple’s product page also lists the upcoming iPhone Duo, which is not yet included in that guide or this checker. Recheck the official pages for the latest availability.