The intersection of technology and healthcare has ushered in a new era of personalized medicine. Wearable cardiac monitoring devices—compact, non-invasive tools—enable continuous, real-time tracking of heart function, shifting from hospital-based diagnostics to patient-centered monitoring. These innovations are widely used for arrhythmia detection, chronic condition management, and post-operative care. Advancements in biosensor technology, wireless communication, and artificial intelligence are enhancing their accuracy and usability. This review examines the evolution, current trends, and future potential of wearable cardiac monitors in transforming cardiovascular healthcare.