changing phone themes w/o making an account

[ThrillingHuman]

I wanna change a theme on my Samsung phone and don't want to make an account. Is there a way? There should be, right?

 

[Prince_Azmiran_Myrian]

Like having a different themes on phone and desktop at the same time?

 

[lnv]

I wanna change a theme on my Samsung phone and don't want to make an account. Is there a way? There should be, right?

Why not just make an account with a different email? Otherwise unless you use the default your only options are:

root and load theme manually
custom launcher