If you’re a fan of having sound on while you sleep, iPhone has a feature that may help you, and you didn’t even know it. All iPhones running on iOS 15 or later have a white noise feature that is built-in into the phone. The setting is labeled as “background sounds” on your iPhone and can be accessed by going to your Settings, then clicking Accessibility, Audio/Visual, and then choosing Background Sounds. You can choose from several different sounds, including rain, stream, ocean, balanced noise, bright noise, and dark noise. You can also adjust the sound’s volume. Do you like to sleep with sound on?