Your comments

+1!   I have vision problems, I cannot use black text on white background apps. Please add a dark theme in your app, I just avoid using it for now sadly.

And it's a usability / accessibility concern for some. I have vision troubles that cause eye fatigue on bright displays (black text on white background, the "typical" setup for most). so I use dark themes (white text on dark backgrounds) everywhere I can. I mostly avoid using S.A.'s android app because of this.