Does thor 4dual have erics launcher or universal launcher by default?

I just purchased thor 4dual
I am new to this can anyone tell me the ans to my title question and what is hand bright screen option and how do i know it works
Thanks…

Go to Google play store and search Universal launcher lol simple, huh?

Thanks now i m getting to understand the full functionality. One more ques watch faces under lemfo category can also be used for thor 4 right?