Apollo4 Blue Lite System-on-Chip Ambiq Apollo4 Blue Lite System-on-Chip (SoC) is a cost-reduced variation based on the Apollo4 and Apollo4 Plus SoCs and is designed for mid- and mid-low range wearables as host processors and higher-end wearables as the sensor HUB. The Apollo4 Blue Lite SoC has a low die cost and deep sleep power package to support sensor HUB applications.