ActLight's Dynamic PhotoDetector (DPD) for wearables is specifically engineered to revolutionize light sensing in compact devices. This innovative sensor operates on low voltage, significantly extending the battery life of wearable devices such as fitness trackers and smartwatches. The DPD's high sensitivity allows it to detect even minimal light changes without the need for bulky amplifiers, enabling a sleek design and energy-efficient operation. This sensor supports advanced health monitoring features, providing precise heart rate and activity measurements, thereby empowering users with real-time wellness insights. Its compact size makes it ideal for integration into space-constrained wearable devices without compromising performance.