Red Light

I really like its simplicity. Only thing I wish could be fixed is the adjustment bar. I wish it would disappear after a few seconds of non use, or that it was black, or both. I have extreme photophobia, and just that little blue light in the bar can agitate it. Other people perhaps aren't so sensitive.

Works pretty well but Android OS9 has a colour screen filter in the accessibility settings now so I've been using that instead since I upgraded to the Note 10+ 5G, not sure if it's on every version of Android 9 though. If not, this is your best bet. I did a full virus scan and didn't find any issues

I deleted the app only because of of the screen not being totally red. If the level of light bar and the app drawer bar were always in screen. Nice if they would disappear when used after a five second delay.