https://arstechnica.com/gadgets/2023/04/amazon-will-brick-all-halo-health-trackers-on-august-1/

Amazon is giving up on its health-focused Halo devices. The original Halo Band and the Halo View fitness trackers, as well as the Halo Rise bedside sleep tracker and the products' supporting app, will all "no longer function" on August 1, Amazon confirmed today.

Amazon's Halo devices also worked with a Halo subscription service to let users manage health insights from the gadgets. Amazon's pages for the Halo subscription and devices are no longer active.