When Netflix released the Korean horror series If Wishes Could Kill on April 24, it came with a fictional premise designed to unsettle: an app called Girigo grants any wish you speak into your phone's camera, then gives you 24 hours to pass the curse on or die.

Within days, a real version of the app had appeared on Google Play. Within weeks, it had become one of social media's stranger viral phenomena.

What is Girigo app and how does it work?

The downloadable Girigo app markets itself as a wish-recording journal, a video tool where users speak a wish aloud, watch it........

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