Why Do Phones Know When You're Sad?

Phones can feel your mood. Just like how you know when your friend is happy because they smile, your phone knows when you're sad by watching what you do. If you type slowly, play sad music, or even look at the screen for a long time, the phone notices and thinks you might be feeling down.

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Examples

  1. Your phone noticed you were typing slowly and playing sad music, it guessed you're feeling down.
  2. You’ve been looking at the screen a lot, so your phone thinks you might be stressed or sad.
  3. Your phone lights up with a cheerful message just when you’re feeling low.

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