Zephyr HRM BT Status (com.concreterose.heartrate) on Google Play
WARNING: This app is ONLY compatible with ZEPHYR HRM BT heart rate monitors.Heart Rate Status is a simple app for displaying heart rate monitor data. While it supports a graph view, the main functionality is to display heart rate while using other applications via the system status bar or as an overlay.Configure your target heart rate zone, heart rate appears with one of:1. Bar above the number, heart rate is below target zone.2. Bar below the number, heart rate is above target zone.3. Bars both above and below, in target zone.This app is only for exercise assistance.Known issues:- Graph sometimes flickers due to a bug in the chart library.