Instead of a soft, gentle purr, she lets loose a series of loud, trilling noises that sound more like a tiny, ferocious dinosaur than a sleepy house cat. The contrast is hilarious and oddly endearing.

“Is my cat happy or not?”, is a question that has been haunting owners of notoriously inscrutable felines since forever – but it may soon be answered thanks to a new app. The prototype app, dubbed ...