The Dynamic PhotoDetector (DPD) tailored for hearables by ActLight offers an unparalleled advancement in light sensing technology for compact audio devices. Designed for energy efficiency, the DPD operates at low voltages which not only conserves battery life but also maintains peak performance, crucial for modern, on-the-go audio wearables. With its high sensitivity, the sensor excels in detecting minute changes in light conditions, thus ensuring consistent and reliable biometric data acquisition. This makes it particularly advantageous for heart rate and activity monitoring in hearables, enhancing the overall user experience with precise health tracking capabilities.