ANT+ HR Monitor is a free lifestyle application developed by Thomas Maven for Android devices. This app allows you to display your current heart rate value, but to use this feature, you need an ANT+ heart rate sensor that is compatible with your smartphone. You can find the list of compatible devices on the official website of ANT+.

The app is straightforward and easy to use. Once you connect your ANT+ heart rate sensor to your phone, the app will automatically detect it and display your heart rate on the screen. The interface is simple, with a large, easy-to-read font that displays your heart rate in beats per minute (BPM). It's a great app for athletes, fitness enthusiasts, or anyone who wants to keep track of their heart rate during exercise or other activities.