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
★3.6
Demo Mode Settings
Demo Mode Settings
★4.4
Brightness Switcher
Brightness Switcher
★4.3
Minimal Analog Watch Face
Minimal Analog Watch Face
★4.5
Dark Mode: Night Mode All Apps
Dark Mode: Night Mode All Apps
★3.9
Automatic Dark Theme for Andro
Automatic Dark Theme for Andro
★4.3
App Brightness Manager
App Brightness Manager
★4.2
Night Light
Night Light
★4.5
Galactic Night [root, Samsung]
Galactic Night [root, Samsung]
★3.4
Battery Level Indicator
Battery Level Indicator
★3.2
Color Light Changer
Color Light Changer
★3.6
Settings App
Settings App
★4.0
Dark screen filter
Dark screen filter
★4.2
Dark screen filter - Dark mode
Dark screen filter - Dark mode
★3.7
Control Center - Panel Plus
Control Center - Panel Plus
★3.7