Read more: White Noise vs. Brown Noise: Which One Is Best for Sleep? Apple released iOS 18.3 in January, but when the company released iOS 15 in 2021 that operating system brought a hidden feature to ...

So instead of buying a white noise machine, save yourself some money and just use your iPhone. 1. Tap Settings. 2. Tap Accessibility. 3. Tap Audio & Visual. 4. Tap Background Sounds. 5.