[icebraining]

Twilight just doesn't feel the same. Unlike f.lux and redshift, which actually seem like they change the color of the screen, Twilight just seems to overlay a red filter. I can't tell you why, but the result is much less satisfactory.

[dota_fanatic]

Twilight is just a red overlay. If you want the real deal like f.lux or redshift, there's Cf.lumen (requires root) which works great and even offers a "freeloader" option for pro features.