Apps like Gray-Switch (Grayscale)

Here are some great alternatives to Gray-Switch (Grayscale) by Vegard IT GmbH :
Greyscale
Greyscale
★3.8
Digital Wellbeing
Digital Wellbeing
★3.7
Brightness Switcher
Brightness Switcher
★4.2
Demo Mode Settings
Demo Mode Settings
★5.0
Dark Mode: Night Mode All Apps
Dark Mode: Night Mode All Apps
★4.0
CF.lumen
CF.lumen
★4.0
Automatic Dark Theme for Andro
Automatic Dark Theme for Andro
★4.3
Blue Light Filter-Eye Care
Blue Light Filter-Eye Care
★4.1
UsA Simply Grey - USA106
UsA Simply Grey - USA106
★4.2
Night Light
Night Light
★4.5
Galactic Night [root, Samsung]
Galactic Night [root, Samsung]
★3.9
Variety Status Viewer
Variety Status Viewer
★4.1
Color Light Changer
Color Light Changer
★3.8
Battery Level Indicator
Battery Level Indicator
★3.2
Settings App
Settings App
★4.0
Dark screen filter
Dark screen filter
★4.2