Sometimes, the auto brightness feature may not properly adjust your iPhone’s brightness according to the ambient light. So, if you want to manually set your brightness instead, turn off this feature.
To do so, simply head over to the Settings and toggle off Auto-brightness.
In Settings, the Auto brightness feature is actually tucked inside the Accessibility header. So, to turn off Auto-Brightness,
- Open the Settings application.
- Go to Accessibility > Display & Text Size.
- Scroll down and toggle off the Auto-Brightness option.
- Exit Settings.
Now, you can manually adjust your brightness from the control center without having it automatically changed.
Additionally, if your iPhone is still slightly adjusting brightness on its own, turn off the True Tone setting as well.
Turn Off True Tone
The True Tone feature is more of a color setting than a brightness one. It automatically adjusts your iPhone’s display based on ambient light to make colors appear consistent in different environments.
While it doesn’t affect brightness much, try turning this setting off if you’re seeing an awkward shift in colors.
- Launch Settings.
- Go to Display & Brightness.
- Under the Brightness slider, toggle off True Tone.
Why is My Brightness Still Changing Automatically?
Even after turning off Auto-Brightness and True Tone, you may still see some shift in your screen brightness. This usually happens if your iPhone is overheating or if the Low Power Mode is on.
When your iPhone gets too hot, it will automatically dim your screen and lower your maximum screen brightness. The only way to remove your limited maximum brightness is by letting the iPhone cool down.
Another way your brightness can change on its own is if Low Power Mode is enabled. In such cases, your iPhone will try to maximize battery life by changing various settings, including display brightness.
