Hacka Doll is a Japanese anime series based on the Hacka Doll mobile app, which is designed to provide users with personalized news feeds. The series follows the antics of three Hacka Dolls, AI characters, as they attempt to improve people's lives by offering personalized assistance. Each episode explores humorous scenarios with a touch of randomness and chaos. The anime is known for its lighthearted comedy, vibrant animation, and quirky characters.