Is your cat saying “feed me!” or “I love you?” A new AI-powered app promises to demystify what your feline is saying. Cats only meow with people—but it can be hard to know what they're trying to say.

Many cat owners assume meowing is random, a dramatic demand for food or perhaps a sign of boredom. Yet recent findings suggest there is much more strategy behind those vocal greetings. Cats may change ...