Where Do I Shut Off Auto Brightness On My iPhone 15?

To turn off the auto-brightness on an iPhone 15, go into your Settings, tap Accessibility, then Display & Text Size, and toggle off the Auto-Brightness switch.

After you disable auto-brightness, your iPhone 15 will no longer automatically adjust its screen brightness based on surrounding light conditions. You will have to manually control the brightness from your settings or Control Center.

You can also watch this video about how to turn off auto brightness on an iPhone 15 for additional info.


Tinkering with your iPhone 15 settings can seem daunting at first, especially with the wealth of options Apple provides. But fear not, tech enthusiasts and casual users alike, for the task at hand is simpler than it appears. Have you ever been annoyed when your iPhone screen dims or lights up on its own? That’s the auto-brightness feature doing its job, adapting your screen to the lighting around you to make sure it’s always visible.

While handy, it’s not always desirable—maybe you’re reading in bed and want the screen dimmer, or you’re outside and need it brighter than the auto setting allows. Turning off auto-brightness can give you back control, ensuring your screen looks exactly how you want it, no matter where you are or what you’re doing. This is particularly relevant to anyone who values consistency in their screen’s display or those who need to manage their battery life more actively.

Related: How to Adjust iPhone 14 Flashlight Brightness

A Step by Step Tutorial

This tutorial will guide you through disabling the auto-brightness feature on your iPhone 15, allowing for manual screen brightness control.

Step 1: Open Settings

Tap the Settings icon on your home screen to open the settings menu.

The Settings app is where all the magic happens—it’s your go-to place for tweaking your iPhone to work just how you like it. Once you’re in, you’re one step closer to taking control of your screen brightness.

Step 2: Tap Accessibility

Scroll down and tap on the Accessibility option.

Accessibility features are not just for those with specific needs—they house a treasure trove of settings that can optimize how you use your iPhone.

Step 3: Select Display & Text Size

In the Accessibility menu, find and select the Display & Text Size option.

This menu is all about making your iPhone’s display easier to see and read. But nestled among these options is where you’ll find the key to mastering your brightness settings.

Step 4: Toggle Off Auto-Brightness

Scroll to the bottom of the list and toggle the Auto-Brightness switch off.

Flipping this switch is like taking the training wheels off your bike—you now have full control, and your iPhone won’t be making any decisions about screen brightness for you.


Pro 1: Consistent Screen Brightness

You’ll enjoy a consistent screen brightness level, unaffected by changes in your environment.

This means no more squinting or being blinded out of the blue. It’s all in your hands now—whether you’re scrolling through memes in bed or checking emails under the bright sky, your screen will stay just as you left it.

Pro 2: Better Battery Management

Turning off auto-brightness can sometimes help extend your battery life, as you may opt for a lower brightness level than the automatic setting.

Auto-brightness can be a bit overzealous, turning up the brightness higher than you might need. With manual control, you can keep things dimmer, more pleasant to the eyes, and kinder to your battery.

Pro 3: Personal Preference

Manual adjustment allows you to set the brightness to your personal preference, improving the overall user experience.

You’re the captain of this ship, and you can sail towards a brighter horizon or a dimmer cove as you please. It’s about what looks best to your eyes and nothing else.


Con 1: Manual Adjustment Required

You will need to manually adjust your screen brightness to adapt to changing light conditions.

This can be a bit of a hassle, especially if you’re someone who moves between different lighting often. It’s the price of control—constant vigilance!

Con 2: Potential Eye Strain

Inadequate lighting settings can lead to eye strain or discomfort, particularly in dark environments or during extended use.

Without auto-brightness, you might forget to adjust the setting and end up in a staring contest with a screen that’s just too bright or too dim.

Con 3: Missed Convenience

You lose out on the convenience of your iPhone automatically compensating for environmental changes.

It’s like having a butler who always knows when to open the curtains or dim the lights. When you send them away, you have to do it yourself.

Video About Auto-Brightness

Additional Information

When it comes to tweaking your iPhone 15’s auto-brightness, context is key. Remember that disabling it might save you some battery life, but it’s not a guarantee. If you’re the type who frequently enjoys the great outdoors or works in brightly lit offices, your battery might drain faster if you forget to lower the brightness. On the flip side, those who spend most of their time in dimly lit environments could find that their battery benefits from the change.

Moreover, there’s a bit of a myth that needs busting: turning off auto-brightness doesn’t mean your iPhone’s ambient light sensors are off the job. They’re still working, ready to jump back into action should you decide to re-enable the auto-brightness feature. Also, consider the Night Shift and True Tone features, which also affect your display but are more about color temperature than brightness—they remain at your disposal for a more comfortable viewing experience.


  1. Open Settings
  2. Tap Accessibility
  3. Select Display & Text Size
  4. Toggle Off Auto-Brightness

Frequently Asked Questions

Does turning off auto-brightness affect battery life?

Turning off auto-brightness may improve battery life if you typically set your screen brightness lower than what auto-brightness would select.

Will my iPhone still adjust to lighting conditions if I turn off auto-brightness?

No, you will need to manually adjust the screen brightness as your lighting conditions change.

Can turning off auto-brightness harm my iPhone?

No, disabling auto-brightness does not harm your iPhone, but it may affect your user experience.

Is it possible to turn auto-brightness back on after disabling it?

Yes, you can re-enable auto-brightness at any time by following the same steps and toggling the switch back on.

Will disabling auto-brightness affect Night Shift or True Tone settings?

No, disabling auto-brightness will not affect Night Shift or True Tone settings.


Mastering your iPhone’s settings allows for a personalized experience, and knowing how to disable auto-brightness on your iPhone 15 is a prime example. While the process is simple, the implications are significant, empowering you to decide how and when you want to see your screen. We’ve weighed the pros and cons, from consistent brightness to potential eye strain, giving you a rounded view to make an informed decision.

Embrace the control or the convenience, but do so understanding the responsibility that comes with each choice. Remember, it’s not just about personal preference, but also about optimizing your device for the best possible experience in every facet of your digital life.

Engage with your device, explore its features, and most importantly, ensure it serves you in a way that fits seamlessly into your lifestyle.

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