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[aviator25]

Currently, Samsung phones do not have a built-in scheduling feature for screen brightness or screen timeout. 

Please consider this option.

[Oxford]

I'm sure that could be accomplished via a routine.

[LongHiker]

@aviator25 As @Oxford  stated, you can easily create your own routines to make the brightness changes you want. 

[realaud]

That's what routines are for, as everyone else has already stated.

[JBTechfanatic]

decent options built right in also.