What changes come in each iPhone update
Apple releases major iPhone updates once a year, usually in September, and smaller updates throughout the year. Each update brings new features, security fixes, and performance improvements. The easiest way to see what's new is to go to Settings > General > About on your iPhone — the version number tells you which update you have — then check Apple's official release notes on their website for that specific version.
Major updates (like iOS 18 or iOS 17) add visible features you'll notice right away: new camera tools, different ways to organize your home screen, changes to how notifications work, or new apps. Smaller updates (like 18.1 or 18.2) usually fix bugs and improve security without changing how the phone looks or works day-to-day.
Key Takeaways
- Major iPhone updates arrive once a year in September and include new features, while smaller updates come throughout the year with mostly security fixes.
- You can see your current iOS version in Settings > General > About, and Apple publishes detailed release notes for each version on their website.
- New features often affect the camera, home screen layout, Siri, notifications, and built-in apps like Mail and Photos.
- Updates install automatically if you have automatic updates turned on, or you can install them manually through Settings > General > Software Update.
How to check what version you're running
Open Settings on your iPhone, then tap General, then About. Look for the line that says Software Version — that's your current iOS number. If it says 18.2, you're on iOS 18 with the 18.2 update installed.
Once you know your version, go to Apple's security updates page or search "iOS [your version number] release notes" to read what that specific update changed. Apple lists new features, bug fixes, and security patches for every version they've released.
Where to find detailed information about new features
Apple publishes release notes for every update on their official website — search for "iOS release notes" and you'll find them. The notes list features in order, starting with the biggest changes. They also publish a separate "What's new in iOS" page each September when the major update launches, with videos and explanations of the main features.
Tech websites like MacRumors, 9to5Mac, and The Verge also write detailed breakdowns of new features when updates arrive. These articles often include screenshots and step-by-step explanations of how to use new tools, which can be clearer than Apple's official descriptions.
Common features that change between updates
Camera tools are updated frequently — you might get new editing options, better low-light performance, or new ways to take photos. The home screen and lock screen often change, with new ways to organize apps or customize how information displays. Siri (Apple's voice assistant) gets new abilities, and notifications sometimes work differently.
Built-in apps like Mail, Messages, Photos, and Safari get updates too. For example, one update might add a new way to search your photos, while another might change how you organize emails. Battery and performance also improve in most updates, though you won't see a visible change — your phone just runs smoother or lasts longer.
How to install an update
If you have automatic updates turned on, your iPhone will install updates overnight when plugged in and connected to Wi-Fi. To check if automatic updates are on, go to Settings > General > Software Update > Automatic Updates and make sure Download iOS Updates and Install iOS Updates are both toggled on.
To install an update manually, go to Settings > General > Software Update. If an update is ready, tap Download and Install. Your phone will restart during the process, so plug it in first and make sure you have time — updates usually take 10 to 30 minutes. You'll lose no data; everything on your phone stays exactly as it is.
Why some features might not appear on your phone
Not every feature works on every iPhone model. Newer features often require newer hardware — for example, a camera feature might only work on iPhone 15 Pro, not on iPhone 13. Apple's release notes usually specify which iPhones support each new feature, so check there if you update but don't see something you expected.
Some features also roll out gradually. Apple might release an update, but a specific new feature doesn't appear on all phones at once — it can take days or weeks to reach everyone. If you update and don't see a feature mentioned in the release notes, wait a few days and check again.
What to do if you're not ready to update
You can delay updates by turning off automatic updates in Settings > General > Software Update > Automatic Updates. However, Apple eventually stops signing older versions, which means you won't be able to stay on an old update forever — usually a few months after a new major update arrives.
Security updates are important because they fix vulnerabilities that hackers can exploit. If you delay a major feature update, you should still install security updates when they arrive. These are usually smaller and don't change how your phone works, only how it's protected.
Frequently Asked Questions
Will updating delete my photos, messages, or other data?
No. Updates preserve everything on your phone. Your photos, messages, apps, settings, and files all stay exactly as they are. The update only changes the operating system underneath.
How long does an update take to install?
Most updates take 10 to 30 minutes from start to finish. Your phone will restart one or more times during the process. Plug in your phone and make sure you're on Wi-Fi before you start.
Can I use my iPhone while it's updating?
No. Your phone will be unavailable during the update process. It will restart several times, and you won't be able to use it until the update finishes. Plan for at least 30 minutes of downtime.
What if my iPhone is too old to get the new update?
Older iPhones stop receiving updates after a few years. If your phone won't show a software update option, it has reached the end of its update cycle. You can still use it, but you won't get new features or security patches.
Do I have to update, or can I stay on the old version?
You can delay updates by turning off automatic updates, but Apple eventually stops signing older versions. You can usually stay on an old version for a few months, but eventually you'll need to update to keep your phone secure.