Amazon Halo Band is an accurate health tool on its own, but offers even more as part of Amazon Halo, the health and wellness membership designed to help you improve your health by better understanding it. Halo members have full access to our ever-expanding suite of tools, features, and programs including Body composition and Tone. Non-members can still use the Amazon Halo Band and Halo app to access basic features like steps, heart rate, sleep time, and sleep tracking. Click here for the Amazon Halo Band – Measure how you move, sleep, and sound – Designed with privacy in mind, only $49.99 for a limited  time.