Where to find the auto-lock setting on your iPhone
The auto-lock timeout — the time your iPhone 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 current setting appears there, and tapping it opens a list of options.
Every iPhone model uses the same path. The setting controls how long the phone stays awake after you stop using it. If you do not change it, your iPhone defaults to 30 seconds on most models.
Key Takeaways
- Auto-Lock is found in Settings > Display & Brightness > Auto-Lock, and you can set it anywhere from 30 seconds to 5 minutes, or turn it off entirely.
- Shorter timeouts (30 seconds to 1 minute) save battery but require you to unlock more often; longer timeouts (2 to 5 minutes) let you use the phone longer without unlocking.
- If you turn Auto-Lock off, your screen stays on indefinitely until you manually lock it, which drains the battery quickly.
- Face ID and Touch ID unlock your phone when ready when you pick it up, so the timeout mainly affects how long the screen stays lit after you set it down.
The timeout options and what each one means
When you tap Auto-Lock, you see five choices: 30 Seconds, 1 Minute, 2 Minutes, 5 Minutes, and Never. The number tells you how many seconds or minutes pass without any touch or interaction before the screen locks.
30 Seconds is the factory default and balances battery life with usability for most people. 1 Minute gives you a little more time to read or look at the screen without touching it. 2 Minutes and 5 Minutes are useful if you read long articles, watch videos, or use your phone hands-free. Never turns off auto-lock entirely — the screen stays on until you manually press the side button or lock button to turn it off.
Choosing Never drains your battery much faster because the screen consumes the most power on an iPhone. Most people should avoid it unless they are using the phone in a specific situation, like following a recipe while cooking, and they can plug it in afterward.
How battery life changes with different timeout settings
Shorter timeouts use less battery because the screen turns off sooner. The display is the single largest power consumer on an iPhone, so every extra minute it stays lit costs you battery time. If you set Auto-Lock to 30 Seconds, your phone will last noticeably longer than if you set it to 5 Minutes, especially if you use your phone throughout the day.
The difference is most noticeable if you tend to set your phone down without locking it — for example, while reading or waiting. With a 30-second timeout, the screen goes dark quickly. With a 5-minute timeout, the screen stays lit the whole time, and you lose that battery capacity.
If battery life is your priority, use 30 Seconds or 1 Minute. If you use your phone in situations where you need the screen to stay on without touching it, accept that you will use more battery and consider having a charger nearby.
Why you might want a longer timeout
A longer timeout is useful when you are reading, following instructions, or watching something and do not want to unlock the phone repeatedly. If you are reading an article and glance away for 40 seconds, a 30-second timeout means the screen locks and you have to unlock it again to keep reading. A 2-minute or 5-minute timeout keeps the screen lit through natural pauses.
Cooking and fitness are common reasons to use a longer timeout. If you are following a recipe on your phone and your hands are wet or full, you cannot touch the screen to keep it awake. A 5-minute timeout lets you read several steps without the screen locking.
The trade-off is battery drain. If you use a longer timeout, plan to charge your phone more often or keep a charger in your bag.
Turning off auto-lock and why you usually should not
Selecting Never disables auto-lock completely. Your screen stays on until you manually lock the phone by pressing the side button (on iPhone X and newer) or the top button (on older models). This is rarely the right choice because it wastes battery very quickly.
The only common reason to turn off auto-lock is if you are using your iPhone in a fixed location where it is plugged in — for example, as a bedside clock or a kitchen display. Even then, you can achieve the same effect by setting a longer timeout and plugging in the phone when you need it to stay on.
If you do turn off auto-lock, remember to lock your phone manually when you are done using it, or it will stay awake and drain the battery. Most people find this annoying and switch back to a timed setting within a day.
How Face ID and Touch ID affect the timeout
Face ID and Touch ID do not change how the timeout works, but they change how often you notice it. When your screen locks, Face ID or Touch ID unlocks it when ready when you pick up the phone or look at it. You do not have to type a passcode.
This means the timeout mainly affects how long the screen stays lit while you are actively using the phone, not how often you have to unlock it. If your screen locks while you are reading, Face ID wakes it up the moment you look at it again — so fast you might not realize it locked.
If you do not have Face ID or Touch ID set up, a longer timeout is more important because you will have to type your passcode every time the screen locks. In that case, 2 to 5 minutes is more practical than 30 seconds.
Changing the setting on different iPhone models
The path is identical on every iPhone model: Settings > Display & Brightness > Auto-Lock. This has been true since the setting was introduced, so whether you have an iPhone 15, iPhone 12, or an older model, you follow the same steps.
Some older iPhones (iPhone 6s and earlier) called this setting "Auto-Lock" in a slightly different location, but the function is the same. If you cannot find it in Display & Brightness, search for "Auto-Lock" in the Settings search bar at the top of the Settings app — it will take you directly to the setting.
Frequently Asked Questions
Does changing the timeout affect how long before my iPhone locks for security?
No. The timeout only controls when the screen turns off. Your iPhone still locks for security after the screen is dark, and you still need Face ID, Touch ID, or your passcode to unlock it. The timeout does not weaken security.
Will a longer timeout drain my battery noticeably?
Yes. The screen uses far more power than anything else on your iPhone. Changing from 30 seconds to 5 minutes can reduce battery life by several hours over a full day, depending on how much you use your phone. If battery matters, stick with 30 seconds or 1 minute.
Can I set a custom timeout that is not one of the five options?
No. iPhone only offers 30 Seconds, 1 Minute, 2 Minutes, 5 Minutes, and Never. You cannot create a custom timeout like 45 seconds or 3 minutes. You have to choose from the list provided.
What happens if I set auto-lock to Never and then forget to lock my phone?
Your screen stays on and drains the battery until it runs out of power. The phone will not lock itself. If you use Never, you must remember to lock it manually, or you risk coming back to a dead phone.
Does the timeout explore when I am using an app?
Yes. If you are in an app and do not touch the screen for the duration you set, the screen locks. Some apps like Maps or Music can request that iOS ignore the timeout and keep the screen on, but most apps follow the timeout you set.