Cats are considered to be lucky in Japan, and owners of popular cats spend a lot of money on their maintenance. But how can you tell if they’re in pain?

A Tokyo-based software company and university have collaborated to create an app trained on thousands of cat images that can tell you whether cat is in pain. “Cat Pain Detector” has 43,000 users, largely in Japan, but also in Europe and South America, according to Go Sakioka, CEO of developer Carelogy.

Carelogy collaborated with Nihon University’s College of Bioresource Sciences to collect 6,000 cat pictures and meticulously study the postures of the cats’ ears, noses, whiskers, and eyelids.

They then utilised a grading system developed by the University of Montreal to distinguish between healthy cats and those in discomfort owing to difficult-to-diagnose disorders.

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