Calories Burned by Heart Rate

Ever since I started exercising using a plethora of fitness devices, ive always wondered if the calories burned are accurate. I tried using the different calculator websites, but found a need to have a calories burned by heart rate, age, and weight calculator at my finger tips. 

- Calculate calories burned by age, heart rate, sex and weight.
- Calculate target heart rate zone based on age.
- Calculate Basal Metabolic Rate
- Calculate BMI using imperial or metric
- Inspirational Quotes
- Weight logger