Customising your home screen involves just a few steps and the Apple ‘Shortcuts’ app. Before you start make sure you’ve downloaded your new icons and saved them to your photos.
Open the shortcuts app.
Tap the ‘+’ icon in the top right of the screen.
Tap the ‘+ Add Action’ button.
Search for the ‘Open App’ shortcut
With the ‘Open App’ shortcut selected, tap ‘choose’, and select the app for which you want to change the icon.
Tap the three dots in the top right and select ‘Add to home screen’.
Tape the icon to reveal the menu and select ‘choose photo’.
Choose the icon from your photos.
Finally, choose the name, either use the name of the app you are replacing or leave it blank for a more minimalist look.