Demand for indoor navigation systems has been rapidly increasing with regard to location-based services. As a cost-effective choice. inertial measurement unit (IMU)-based pedestrian dead reckoning (PDR) systems have been developed for years because they do not require external devices to be installed in the environment. In this paper. https://parisnaturalfoodes.shop/product-category/sea-rich-omega-3-lemon-d3-1500-750/