HR Zones - Target Heart Rate is a free iPhone app developed by Andrew Arhelger. This lifestyle app falls under the Health & Fitness subcategory. If you are someone who exercises regularly and wants to improve your cardiovascular fitness, this app is a must-have.

The main feature of this app is that it helps you determine your target heart rate exercise zone. By taking into account your age and resting heart rate, the app calculates your unique heart rate zones and displays them in an easy-to-view format.

One of the key benefits of using this app is that it helps you stay aware of your heart rate during exercise. It guides you to exercise within your optimum heart rate zone, ensuring that you derive maximum benefits from your workout. If your heart rate is too low, you may not get much benefit, while if it's too high, you risk injuring yourself. By staying within your target zone, you can burn body fat and calories effectively while improving your cardiovascular health.

It is important to note that heart rate zones and exercise ability can vary from person to person. This app serves as a guide, but if you have any questions or concerns about your heart rate zones, it is always recommended to consult with your doctor. Additionally, before starting any new exercise routine, it is advisable to discuss it with your doctor.