The company has outlined steps to set up the new heart rate sharing feature on an official help page. And it’s fairly simple. You can enable the feature by going to the Halo app’s Settings, selecting Heart Rate Sharing, and then turning the “Share heart rate” setting on. You will be asked to accept the privacy terms after which the on-screen prompts will guide you to complete the pairing. The companion smartphone app offers a wide range of workouts and wellness programs to help you get in shape. Additionally, it can also measure your body fat percentage, though this feature may not always work accurately.