Staying up late and reading your iPhone or iPad is actually affecting your sleep.
But a new feature in the upcoming IOS 9.3 software update is going to help prevent this.
The feature, called Nightshift, switches the screen from emitting bright blue lights to warmer colors, which are easier on your eyes and allow your body to fall asleep more natural.
Here's how, launch Launch the Settings app and then select Display and Brightness.
Tapping the switch next to the Blue Light Reduction will turn the feature on.
But you're better off using the Schedule option.
This will automatically turn Night Shift on when the sun sets.
Or a specific time of day.
Using the slider below, you can adjust how drastic the color change is.
The warmer the color the better, but choose a level that's comfortable for your eyes.
For more how tos like this one, be sure to check out howto.cnet.com, or reach out to me on Twitter with any questions or comments.
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