Want to be less distracted by your phone? Try grayscale mode (iOS).

Step 1: Set up Grayscale.
Open your iPhone’s Settings > Accessibility
Select Display & Text Size
Scroll and select Color Filters
Toggle Color Filter On and then check Grayscale
Step 2: Create the Grayscale shortcut, which lets you easily switch it on and off.
Go to iOS Settings > Accessibility
Scroll down to Accessibility Shortcut > select to check Color Filter
Once configured, triple-click the side button to turn the Grayscale filter on and off.