You can make your iPhone black and white by turning on Grayscale in the device's Accessibility settings. When you make your iPhone black and white, it can save some battery and be easier on your eyes — and it could make your phone less addicting. But there are many ways to change the colors on your iPhone, and you can even turn it black and white. Here's how to access the Grayscale feature through the iPhone's Accessibility features:How to make your iPhone black and white using Grayscale1. Select "Grayscale."

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