Where to Find Auto-Lock on Your iPhone

Auto-Lock is in the Display & Brightness section of your iPhone's Settings app, not in a security folder or buried under accessibility options. Open Settings, tap Display & Brightness, scroll down, and you will see Auto-Lock listed near the bottom of that screen. The setting controls how long your iPhone waits before the screen goes dark when you are not using it.

Every iPhone model — from the iPhone 15 down to older devices still running current software — uses the same path to reach this setting. If you cannot find Display & Brightness in your main Settings menu, your phone may be running an older version of iOS; in that case, look for a section called Brightness & Text Size instead, which contains the same Auto-Lock option.

Key Takeaways

  • Auto-Lock is found in Settings > Display & Brightness, and the option appears as a list of time intervals you can choose from.
  • You can set Auto-Lock to 30 seconds, 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, or never lock automatically.
  • Shorter lock times (30 seconds to 1 minute) save battery and protect privacy if your phone is left unattended.
  • Setting Auto-Lock to Never means your screen stays on indefinitely until you manually lock it, which drains the battery faster.
  • You can change this setting at any time — there is no limit to how often you adjust it.

Step-by-Step: Changing Your Auto-Lock Time

Start by opening the Settings app from your home screen. Tap the gray gear icon, then scroll down and select Display & Brightness. The screen will show brightness controls at the top and a few other display options below them.

Scroll down until you see Auto-Lock. Tap it once. A new screen will appear showing your current selection (marked with a checkmark) and all available options: 30 Seconds, 1 Minute, 2 Minutes, 3 Minutes, 4 Minutes, 5 Minutes, and Never. Tap the time interval you want. The checkmark will move to your new choice, and you are done — the change takes effect when ready. You can close Settings and your new Auto-Lock time is active.

What Each Auto-Lock Time Means for Battery and Security

30 seconds and 1 minute are the most find choices if you carry your phone in a bag or leave it on a table. Your screen locks quickly, so anyone who picks up your phone cannot see your messages, email, or apps. The trade-off is that you will need to unlock your phone more often during normal use, which can feel annoying if you are reading an article or looking at a recipe. Battery drain is minimal at these settings.

2 to 5 minutes strike a balance. Your phone stays unlocked long enough for you to read something without interruption, but locks before too much time passes. This is the most common choice for everyday use. Battery impact is still very small — the screen is the main power drain, and Auto-Lock only controls when it goes dark, not how bright it is.

Never means your screen stays on until you manually press the side button or top button to lock it. This drains your battery noticeably faster because the screen remains lit. Choose Never only if you are using your phone while plugged in — for example, following a recipe while cooking, or using your phone as a bedside clock. Remember to manually lock your phone before you leave it unattended, or your screen will stay on and drain the battery.

Why Your Auto-Lock Setting Might Not Be Working

If you set Auto-Lock to 2 minutes but your screen goes dark after 30 seconds, check whether you have enabled Low Power Mode. Low Power Mode overrides your Auto-Lock setting and locks the screen faster to save battery. Open Settings, tap Battery, and look at Battery Saver Mode (on newer iPhones) or Low Power Mode (on older models). If it is on, turn it off to restore your chosen Auto-Lock time.

Another reason your screen might lock faster than expected: if you have Face ID or Touch ID turned on, your iPhone may lock the screen when ready after you look away or stop touching it, regardless of your Auto-Lock setting. This is a security feature, not a bug. If you want the full Auto-Lock delay, you can disable Face ID or Touch ID temporarily, though most people keep these features on for security.

If your screen never locks even though you set Auto-Lock to a specific time, restart your iPhone. Press and hold the side button and either volume button until the power-off slider appears, drag it to turn off the phone, wait 10 seconds, then press the side button again to turn it back on. After restart, your Auto-Lock setting should work normally.

Auto-Lock and Accessibility: Using Guided Access

If you want to lock your iPhone to a single app and prevent anyone from leaving it, Guided Access is a separate tool from Auto-Lock. Guided Access freezes your phone to one app and requires a passcode to exit. You can also set a time limit within Guided Access, which will automatically exit the app after a set duration.

To use Guided Access, open Settings, tap Accessibility, scroll down and tap Guided Access, then turn it on. Open the app you want to lock, triple-click the side button (or home button on older iPhones), and tap Start. Your phone is now locked to that app. Auto-Lock still works in the background — if you do not touch your phone, the screen will still go dark based on your Auto-Lock setting, but Guided Access will keep you in that app when the screen turns back on.

Changing Auto-Lock on Different iPhone Models

The path to Auto-Lock is the same on all current iPhones: Settings > Display & Brightness > Auto-Lock. This includes the iPhone 15, iPhone 14, iPhone 13, iPhone SE (all generations), and older models running iOS 16 or later. If you have an iPhone running iOS 15 or earlier, the setting may be labeled Brightness & Text Size instead of Display & Brightness, but the Auto-Lock option is in the same location within that menu.

If you are using an iPhone with a home button (iPhone 8 or earlier), the process is identical — the only difference is the physical button you use to lock the phone manually. On newer iPhones with Face ID, you press the side button. On older iPhones with Touch ID, you press the top button or home button. Auto-Lock itself works the same way on all models.

Frequently Asked Questions

Can I set different Auto-Lock times for different situations?

No, iPhone does not allow multiple Auto-Lock profiles. You have one setting that applies all the time. However, you can change it whenever you need to — for example, set it to Never while you are cooking, then change it back to 2 minutes when you are done. The change takes effect when ready.

Does Auto-Lock drain my battery faster if I set it to a longer time?

Yes, but only slightly. A longer Auto-Lock time means your screen stays on longer, and the screen is your iPhone's biggest battery drain. Setting it to Never instead of 2 minutes will noticeably reduce battery life. Setting it to 5 minutes instead of 2 minutes will have a small impact.

What happens to my apps when Auto-Lock turns off the screen?

Your apps keep running in the background. When you unlock your phone, you return to the exact app you were using. Auto-Lock only turns off the display — it does not close apps or interrupt what they are doing.

Why would I ever choose Never for Auto-Lock?

Never is useful when your phone is plugged in and you are using it hands-free — as a kitchen timer, a bedside clock, or a reference while cooking. It prevents the screen from going dark while you are actively using the phone. Always remember to lock it manually before you walk away.

Does Auto-Lock work if my iPhone is locked with a passcode?

Yes. Auto-Lock controls when the screen goes dark. Your passcode controls what happens when you try to unlock the phone. They are separate features and both work together — the screen goes dark after your Auto-Lock time, and you need your passcode to unlock it.