EaseUS MobiMover

All-in-One iOS Content Manager & Free Video/Audio Downloader

  • An iOS data transfer tool to transfer files to or from iPhone/iPad
  • An iPhone manager to manage files on iPhone/iPad from a computer
  • A free video downloader to download online videos to a computer or iPhone/iPad

iPhone Brightness Keeps Changing? Click for 6 Solutions

sofia albert
Sofia Albert updated on Mar 16, 2023 | Home > iOS & Mac Topics

Screen brightness is one of those things in our phones that is personalized. Not everyone likes the same screen brightness, and some prefer a dim screen, while others want a bright one. In any case, if the iPhone brightness keeps changing, it irritates us. Is your iPhone also behaving in such a way?

If it is true that your iPhone brightness keeps changing, then this may be a result of incorrect settings due to a feature, or there is damage on your screen. Worry no more. In this article, we will go through all the reasons that may be causing this issue on your iPhone.

6 Fixes on iPhone Brightness Keeps Changing

If you are experiencing your iPhone brightness keeps changing, we have also provided some solutions below that you can try to solve the issue.

1. Turn off auto-brightness on your iPhone

If you can turn off the auto-brightness on your iPhone, the device will use the same brightness level in every condition. If the issue is with auto-brightness, this step could easily solve it.

Follow the below steps to turn off the auto-brightness on your iPhone.

Step 1. Open the settings app on your iPhone.

Step 2. Scroll down and Tap on General.

Step 3. Again, tap on Accessibility.

Step 4. Scroll down and go to Display Accommodation.

Step 5. Toggle off the Auto brightness.

turn off auto brightness

2. Turn off the Night shift on your iPhone

The night shift mode is there to adjust the color warmth of your screen, and this change could affect the screen's brightness too. If you turn off the Night shift on your iPhone, the screen brightness will be constant for 24 hours of the day.

To turn off the Night shift on your iPhone, follow the below steps:

Step 1. Open the settings app on your iPhone.

Step 2. Scroll down and open Display & Brightness.

Step 3. Tap on Night Shift.

Step 4. Turn off the "Scheduled" & "Manually Enable Until Tomorrow" options.

These steps will completely turn off the Night Shift, and it will not be able to change the brightness of your screen anymore.

turn off night shift

3. Turn off True tone on your iPhone

As mentioned earlier, True tone adjusts the color and intensity of the screen. This also could result in changes in brightness in some cases. Turning off the True tone feature would let your device use the same tone throughout the day. Although not all iPhone models have True Tone, you can check on your iPhone and turn it off if available.

Follow the below steps to turn off the True tone on your iPhone.

Step 1. Open the settings app on your iPhone.

Step 2. Go to Display & Brightness.

Step 3. If you can see the True Tone option on the top, you can toggle it off. If you cannot see any True Tone option, you do not have True Tone on your iPhone. You can skip this step.

4. Turn off Low Power Mode

Low power mode decreases the power usage of the device and, by extension, the screen's power usage. This directly affects the brightness of the screen when this features gets activated. Turning off this feature would let the device use the needed power for the screen in any situation.

Turn off the Low power mode by following the steps below:

Step 1. Open the settings app on your iPhone.

Step 2. Scroll down and tap on the Battery option.

Step 3. Toggle off the "Low Power Mode" option on this screen.

turn off low power mode

5. Restore Settings

If none of the solutions above solve your problem, you can try to reset iPhone. This will set all the settings to default and probably solve the issue of changing the brightness level on the screen.

Follow the below steps to restore the settings on your iPhone.

Step 1. Open the settings app on your iPhone.

Step 2. Scroll down and open the General settings.

Step 3. Again, scroll down and tap on Reset.

Step 4. Now, tap on the "Reset All Settings" option.

Step 5. Authenticate with the passcode, and it will start resetting all your settings to default.

reset all settings

6. Visit Apple Care

There could also be a problem with the screen itself or the hardware components of the iPhone. If none of the above solutions work for you, you should visit the nearest Apple Care and let the professionals handle it.

Why does iPhone Brightness Keep Changing

Smartphones are evolved to match users' needs, and the same goes for the screen of iPhones. Apple has introduced many features to automatically tailor to the need of the users and also according to the usage behavior and time of the day.

Features such as auto-brightness adjust the screen's brightness automatically using the sensor placed on the top of the screen. 

The sensor that Apple specifically uses for this purpose is the ambient light sensor. It adjusts the screen's brightness by analyzing the light conditions around the user. Another feature, True tone, adjusts the colors and intensity of the display.

Other features like the Night shift determine the sunset and shift the color of the display to warmer colors. There is also the low-power mode which lowers the device's power usage when the charge is too low.

These features help users adjust the display brightness and conserve energy. But in some cases, these features may not work properly and may often result in constant display brightness changes.

We have identified some cases where your iPhone's display brightness keeps changing.

  • When the ambient light sensor is not working properly.
  • When the device's power is too low.
  • When the auto-brightness, true tone, and night shift feature is not working properly.
  • The light condition around you is constantly changing.
  • There is a problem with your screen.
  • There is a problem with the battery of your iPhone.

Although there can be various other reasons, we have only listed these key ones.


Therefore, constant changes in the screen brightness could be caused by multiple reasons. The solutions in this article are for common causes and may not work for rare causes related to hardware problems. You can try the solutions above, and if it does not work, you can take help from a professional. We hope we helped you solve your issue with the screen.

FAQs on iPhone Brightness Keeps Changing

Some frequently asked questions related to the topic are taken from the internet.

1. Why does my iPhone go dark when it's on full brightness?

If your iPhone is going dark even when it's on full brightness, it may be caused by the auto-brightness feature. You can try turning off the feature and see if it works. Else, you can try our solutions provided in this article.

2. How do I stop my iPhone from dimming after 5 seconds?

You can stop your iPhone from dimming after 5 seconds by turning off the auto-brightness feature. If it does not work, we recommend you try all our solutions provided in this article.

3. How do I fix the brightness error on my iPhone?

If your iPhone has a brightness error, you can adjust it by turning off the various features that affect the screen's brightness, such as auto-brightness, true tone, night shift, etc. If the issue persists, try doing the solutions provided in this article.



4.5 out of 5 stars, based on 10 votes

  • What’s also important is that our own analyses, as well as numerous customer reviews of EaseUS MobiMover, show that this software is reliable, user-friendly, and an efficient option for managing your data between devices.

    Read More
  • EaseUs MobiMover solves this problem as it allows you to transfer data from an iPhone to a Mac, Mac to an iPhone, or from one iPhone to another iPhone fast.

    Read More
  • EaseUS MobiMover is a program that allows you to share files between your iOS device and your PC in an easy manner. This is very useful, since both operative systems are not compatible.

    Read More
  • EaseUS MobiMover for Mac and PC is a powerful tool for transferring data from your Apple mobile device to your computer, managing the variety of files that you create, and moving those huge videos quickly.

    Read More