To celebrate Valentine's Day, hit dystopian TV show Black Mirror has released a web app that calculates how long a relationship will last.
Based on the technology in one of the show's most popular episodes, coach.dating is a site that allows a couple to see how long they have until they break up.
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One person sends a link to their partner, then they both click an image of a button at the same time. 'Coach' will then reveal how much time their relationship has left.
It's an imitation of the mysterious dating system in the Season 4 episode 'Hang the DJ', in which users are assigned to relationships with a predetermined time limit.
'Coach' collects data from how the couples respond to each other, eventually providing each user with a person who is supposedly their perfect match.
'Hang the DJ' follows two young people as they navigate a world in which all of the freedom is taken out of dating.
It's one of the notoriously dark Black Mirror's more positive episodes, but that doesn't mean everyone will be happy with the result 'Coach' gives them.