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Why do apps have dark mode?

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Answer: Reduce eye strain and battery use

Make text largerWrong. Dark mode doesn't change text size—it inverts colors (dark background, light text). Purpose is comfort and battery efficiency.

Use less dataWrong. Dark mode doesn't affect data usage—it's a display setting. Benefits are reduced eye strain and battery savings on OLED/AMOLED screens.

Reduce eye strain and battery useCorrect! Dark mode benefits: (1) Reduced eye strain—especially low-light environments; less blue light emission. (2) Battery savings—OLED/AMOLED screens turn off black pixels (unlike LCD). Dark mode = more black pixels = less power. (3) Aesthetic preference—some find it easier to read. Circadian rhythm considerations—less blue light at night may improve sleep. Personal preference varies!

Go deeper: OLED · Circadian rhythm
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