iOS 17: How to Disable Auto Brightness on Your iPhone

To turn off auto-brightness on an iPhone running iOS 17, go to Settings, tap Accessibility, select Display & Text Size, and toggle off the Auto-Brightness switch. Doing this will give you manual control over your iPhone’s screen brightness.

After you complete this action, your iPhone will no longer automatically adjust its screen brightness based on the surrounding light conditions. Instead, you will need to manually adjust the brightness to your preference using the Control Center or Settings.

You can also watch this video about how to disable auto brightness on your iPhone for more on this subject.


When you step outside on a sunny day, squinting as the sunlight beams down onto your iPhone’s screen, you may notice that your device’s brightness automatically increases. This magic is the work of the auto-brightness feature—a nifty little function designed to save your eyes and battery life by adjusting your screen’s brightness according to your environment.

But what if you want to take control of your iPhone’s brightness yourself? Maybe you’re someone who’s sensitive to screen brightness changes or prefers a consistent brightness level. Whatever your reasons, if you find yourself wanting to turn off auto-brightness on your iPhone running iOS 17, you’ve come to the right place. This article is for you—whether you’re a tech newbie or just someone who likes to have things set up just right.

How to Turn Off Auto Brightness on iPhone

Before we dive into the steps, let’s clarify what we’re aiming for here. Turning off auto-brightness gives you full control over your screen’s brightness level, meaning your iPhone will no longer automatically adjust the brightness based on your current light conditions.

Step 1: Open Settings

The first step is to open your iPhone’s Settings app. It’s the one with the gear icon that you probably visit quite often.

In Settings, you have access to a plethora of options to customize your iPhone experience. Think of it as your command center for making your iPhone work just the way you like it.

Step 2: Tap Accessibility

Scroll down and tap on Accessibility. It’s the option with the blue icon that looks like a person.

Accessibility settings are all about making your iPhone easier to use. From here, you can adjust features that help with vision, hearing, and motor skills.

Step 3: Select Display & Text Size

Within Accessibility, find and tap on Display & Text Size. This is where you can tweak how things are displayed on your screen.

The Display & Text Size menu hosts options like Bold Text, Larger Text, and Color Filters, all designed to improve your viewing experience on your iPhone.

Step 4: Toggle Off Auto-Brightness

Finally, you’ll see the Auto-Brightness option. Toggle the switch to turn it off. The switch should no longer be green.

By turning off Auto-Brightness, you are telling your iPhone, “Hey, I’ve got this. I’ll decide when my screen needs to be brighter or dimmer.”


Full Control Over BrightnessHaving the power to adjust your screen brightness manually means you can set it exactly how you like it, regardless of your environment.
Consistent Brightness LevelWithout auto-brightness, your screen won’t unexpectedly change brightness, which can be great if you find those changes jarring or distracting.
Potential Battery SavingsIf you’re mindful about keeping your brightness low, you can actually save some battery life by turning off auto-brightness.


Increased Manual AdjustmentsWithout auto-brightness, you’ll need to manually adjust your screen brightness regularly, which could be inconvenient.
Potential Eye StrainIn varying lighting conditions, not having auto-brightness might lead to eye strain as you may not adjust the brightness as effectively as the automated system.
Battery Drain RiskIf you forget to lower your brightness in a dark environment, you might end up draining your battery faster than with auto-brightness enabled.

Additional Information

When it comes to the brightness of your iPhone’s screen, auto-brightness is a feature that’s often misunderstood. Some people believe turning it off can save battery life, but it’s not always the case. Auto-brightness is actually designed to optimize your battery life by reducing brightness in darker environments and increasing it when there’s more ambient light. However, turning off auto-brightness can be useful if you’re looking to have a consistent level of brightness, which is especially helpful when you’re in control of your lighting, like when you’re indoors or at night.

Remember, even with auto-brightness turned off, your iPhone still offers a Night Shift mode that adjusts the colors of your display to the warmer end of the spectrum after dark. This can help reduce eye strain and make it easier to fall asleep after using your iPhone at night. So, if you’re considering turning off auto-brightness to help your eyes at night, give Night Shift a try instead.


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

Frequently Asked Questions

Will my iPhone’s battery life be negatively affected if I turn off auto-brightness?

This depends on how you manage your brightness settings manually. If you often forget to reduce screen brightness in darker settings, it could lead to faster battery drain.

Can I still adjust my screen brightness manually with auto-brightness turned on?

Yes, you can still adjust your screen brightness manually, but auto-brightness may override your settings in certain lighting conditions.

Is there a way to quickly adjust screen brightness without going into Settings?

Certainly! Swipe down from the top-right corner of your screen to access the Control Center, where you can easily adjust brightness with the slider.

Does turning off auto-brightness help with eye strain?

It could help if you are sensitive to changes in screen brightness. However, keeping the feature on and allowing automatic adjustments might actually reduce eye strain for most users.

Can I turn auto-brightness back on after disabling it?

Absolutely, just follow the same steps and toggle the Auto-Brightness switch back on to enable the feature.


So there you have it, a simple guide on how to turn off auto-brightness on an iPhone with iOS 17. Whether you’re someone who wants a consistent brightness level or just prefers manual control over automatic adjustments, turning off this feature puts the power back in your hands.

Remember, while auto-brightness is crafted to make your life easier and optimize battery life, it’s all about personal preference. Your iPhone is a personal device, after all, so set it up in a way that works best for you. If you ever change your mind, it’s just a few taps away to switch back. Enjoy your bright, vivid iPhone display—on your own terms.