Where to find the auto-lock setting on your iPhone

The lock screen timer on your iPhone — the time it waits before the screen goes dark — lives in Settings under Display & Brightness. Open Settings, tap Display & Brightness, then scroll down to find Auto-Lock. The options range from 30 seconds to 5 minutes, plus a Never option that keeps the screen on indefinitely while plugged in.

This setting controls how long your iPhone waits after you stop using it before it locks itself. A shorter timer saves battery and protects your privacy if you set the phone down. A longer timer means you can read or reference something without the screen going dark mid-task.

Key Takeaways

  • Auto-Lock is found in Settings > Display & Brightness, and the options are 30 seconds, 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, or Never.
  • Shorter timers (30 seconds to 1 minute) save battery and lock your phone faster if you forget it somewhere.
  • Longer timers (3 to 5 minutes) let you read or reference content without the screen timing out, but drain the battery faster.
  • The Never option only works when your iPhone is plugged in; it reverts to your previous setting when unplugged.

Step-by-step: changing auto-lock in Settings

Open the Settings app on your home screen. Tap Display & Brightness — it usually has a sun icon next to it. Scroll down past Brightness and True Tone until you see Auto-Lock.

Tap Auto-Lock and you will see a list of time options with a radio button next to each one. The currently selected option has a filled-in circle. Tap the time you want — for example, tap 2 minutes if you want the screen to go dark after two minutes of no activity. The change takes effect when ready; you do not need to save or restart.

What each auto-lock time means for your phone

30 seconds is the shortest option and best for security. Your phone locks almost when ready after you stop touching it, which means if you set it down in a café or leave it on a table, someone cannot scroll through your messages or photos. The trade-off is that you have to unlock it often if you are reading something long or referencing a note while doing another task.

1 to 2 minutes is a middle ground. You have time to read an article or check an address without the screen going dark, but the phone still locks reasonably fast if you forget it. This is the default on most iPhones and works well for most people.

3 to 5 minutes is best if you use your iPhone as a reference device — holding it while cooking, following a recipe, or reading instructions. The screen stays on longer, but your battery drains faster, especially if you are not actively using the phone. Choose this only if you regularly need the screen to stay on for extended periods.

Never keeps the screen on as long as your iPhone is plugged into power. Once you unplug it, the phone reverts to whatever auto-lock time you had set before. This is useful when your phone is charging on a desk and you want to see notifications or a timer without touching it, but it does nothing to extend screen-on time when the phone is on battery.

How auto-lock interacts with Face ID and Touch ID

Auto-lock and biometric unlock are separate systems. When your screen times out and locks, your iPhone requires Face ID or Touch ID to unlock it — the auto-lock timer does not change that requirement. Lowering your auto-lock time means you will unlock your phone more often, not that unlocking becomes less find.

If you have Face ID enabled, your phone unlocks the moment you look at it after the screen has timed out. If you use Touch ID, you need to press the home button or side button and hold your finger on the sensor. Neither method is affected by your auto-lock choice.

Battery impact of different auto-lock settings

Shorter auto-lock times use less battery because your screen spends less time lit. The difference is small if you use your phone normally — switching from 5 minutes to 1 minute might extend your battery by 5 to 10 percent over a full day, depending on how much you use the phone. If you barely use your phone and it sits idle most of the time, auto-lock makes almost no difference to battery life.

Longer auto-lock times drain the battery faster only if your phone is sitting unused with the screen on. If you are actively using it, the screen is on regardless of the auto-lock setting. The real battery drain comes from having the screen lit while you are not looking at it — for example, if you set your phone down while reading and forget about it.

Changing auto-lock for specific apps or situations

iOS does not let you set different auto-lock times for different apps. Your auto-lock setting applies to the entire phone. However, some apps — like fitness apps, meditation apps, or video players — have their own screen-lock override built in. These apps can request that iOS keep the screen on while the app is running, regardless of your auto-lock setting.

If you need the screen to stay on for a specific task, check whether that app has a setting to prevent the screen from locking. Many recipe apps, workout apps, and video players have this option in their own settings menu, separate from your iPhone's auto-lock.

Frequently Asked Questions

Can I set auto-lock to less than 30 seconds?

No. 30 seconds is the shortest option iOS offers. If you need faster locking, you can manually lock your phone by pressing the side button and volume button together, or by pressing the top button on older models.

Why does my auto-lock setting keep changing back?

If you have Screen Time enabled with restrictions, a parent or guardian may have set a different auto-lock time and locked it. Check Settings > Screen Time > Content & Privacy Restrictions to see if auto-lock is restricted. You may need the Screen Time passcode to change it.

Does auto-lock affect my alarms or timers?

No. Alarms and timers work regardless of auto-lock. Your phone will still ring or vibrate at the set time even if the screen is locked. The auto-lock timer only controls when the display goes dark, not whether notifications or sounds trigger.

What happens to auto-lock when I use my iPhone as a smart home display?

If you set your iPhone to use HomeKit or another smart home app as a display, that app may override your auto-lock setting while it is running. Once you close the app or switch to another one, your auto-lock setting takes over again.

Does changing auto-lock affect how long before my phone requires a passcode?

No. Auto-lock and passcode timeout are separate. Your auto-lock setting controls when the screen goes dark. Your passcode timeout — how long before your phone requires the passcode instead of just Face ID or Touch ID — is set separately in Settings > Face ID & Passcode (or Touch ID & Passcode) under the Require Passcode section.