How to Disable Auto-Brightness on an iPhone 15: A Step-by-Step Guide

Not a fan of your iPhone 15 adjusting the screen brightness on its own? You’re not alone. Sometimes, auto-brightness can be a bit too proactive for our liking, especially when we’re trying to watch a video or read an e-book in varying light conditions. The good news is, disabling auto-brightness on your iPhone 15 is a simple process that can be done in just a few taps. Let’s dive into how you can take control of your screen’s brightness.

Step by Step Tutorial to Disable Auto-Brightness on an iPhone 15

Before we get started, it’s important to know that disabling auto-brightness will give you full control over the brightness of your screen. This means you’ll need to manually adjust it as needed, which can be both a blessing and a curse depending on the situation.

Step 1: Open the Settings app

Tap on the Settings icon on your iPhone’s home screen.

The Settings app is where you can tweak and customize various aspects of your iPhone, including display settings.

Step 2: Scroll down and tap on Accessibility

Swipe up on the Settings menu until you find Accessibility and tap on it.

Accessibility features are designed to make the iPhone easier to use for those with various disabilities or preferences.

Step 3: Tap on Display & Text Size

Within the Accessibility menu, you’ll find the Display & Text Size option, tap on it.

This section contains settings that affect the visual aspect of your iPhone, such as text size and contrast.

Step 4: Scroll down to find the Auto-Brightness option

Swipe up until you see the Auto-Brightness setting.

It’s usually near the bottom of the list, so keep scrolling until you find it.

Step 5: Toggle off Auto-Brightness

Tap the toggle switch next to Auto-Brightness to turn it off.

When the toggle turns from green to grey, it indicates that auto-brightness is disabled.

After completing these steps, your iPhone’s screen will no longer automatically adjust its brightness based on the ambient light conditions. Instead, you will need to manually adjust the brightness to your liking using the Control Center or Settings app.

Tips for Managing Brightness on Your iPhone 15

  • Use the Control Center for quick brightness adjustments.
  • Remember to increase brightness in direct sunlight for better visibility.
  • Reduce brightness in the dark to save battery life and reduce eye strain.
  • Consider enabling Night Shift to reduce blue light exposure at night.
  • Schedule ‘Dark Mode’ to activate automatically at sunset for a more comfortable viewing experience in low light.

Frequently Asked Questions

What is auto-brightness?

Auto-brightness is a feature that adjusts your screen’s brightness based on the light around you.

Why would I want to disable auto-brightness?

Disabling auto-brightness can be useful if you prefer a consistent screen brightness or find the automatic adjustments annoying.

Will disabling auto-brightness affect my battery life?

Yes, manually managing your brightness can impact battery life since the auto-brightness feature is designed to optimize battery usage.

Can I turn auto-brightness back on?

Absolutely, just follow the steps above and toggle the switch back on.

What is Night Shift?

Night Shift is a feature that adjusts the colors of your display to the warmer end of the spectrum, which may help you sleep better.


  1. Open the Settings app.
  2. Scroll down and tap on Accessibility.
  3. Tap on Display & Text Size.
  4. Scroll down to find the Auto-Brightness option.
  5. Toggle off Auto-Brightness.


Disabling auto-brightness on your iPhone 15 can certainly give you more control over your device’s display settings, allowing you to set the brightness exactly where you want it without any interference. Whether you’re someone who consistently uses your phone in similar lighting conditions or you simply prefer to make manual adjustments, turning off auto-brightness is a straightforward process that can enhance your user experience.

Just remember that with this newfound control comes the responsibility of managing your battery life effectively. Without auto-brightness, your screen may consume more power, especially if you forget to lower the brightness in darker environments. But hey, that’s a small price to pay for the power to decide exactly how bright or dim your screen should be, right?

Ultimately, the choice to disable auto-brightness is a personal one, influenced by how you use your iPhone 15 and in what conditions. But with the steps outlined in this article, along with some handy tips and answers to common questions, you’ll be well-equipped to make the decision that’s right for you. And as always, should you change your mind, re-enabling auto-brightness is just as simple. So go ahead, take control of your screen brightness, and tailor your iPhone 15 to your own preferences!

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