The Fitness Calculator is a health tool app.
1. BMI Calculator
Calcualte Body Mass Index (BMI), It is an important indicator to measure obesity and standard weight.

2. BMR Calculator
Calculate Basic metabolic rate (BMR), Basal Metabolic Rate (BMR) is the energy metabolism rate when a person is awake and extremely quiet, unaffected by muscle activity, ambient temperature, food, and mental stress.
The basal metabolic rate has a very large impact on weight loss. A moderate amount of exercise every day helps to increase the body's basal metabolic rate, while dieting will reduce a person's basal metabolic rate. BMR decreases with age or weight loss, and increases with muscle mass.

3. Fat-burning Heart Rate Calculator
Calcualte the Fat-burning Heart Rate,There are three necessary conditions for fat burning exercise:
The first is that the exercise should achieve a moderate-to-low-intensity exercise heart rate;
The second is that this kind of exercise with low-intensity exercise heart rate should last for more than 20 minutes;
The third is that this exercise must be a large muscle group exercise, such as jogging, swimming, aerobics and so on.
Keep your heart rate at the recommended value for the best fat loss.

4. Healthy weight calculator
Calculate Healthy weight, The healthy weight is different from standard weight, it is a range value, and its principle is reversely calculated by BMI body mass index.
Standard weight ±10% is normal weight.
Standard weight ±10%~ 20% is overweight or underweight.
Standard weight ±20% or more is obese or underweight.

5. TDEE calculator
Total Daily Energy Expenditure(TDEE) is the calorie consumption including basal metabolism, activity level, and eating in the whole day. Different lifestyles require different calories. When the daily calorie intake is equal to TDEE, The caloric balance is good for your health.

6. Fitness Index calculator
The Fitness Index is used to get multiple sports and health indicators including BMI, BMR, Fat-burning heart rate, Healthy weight, and Total daily calorie consumption, It helps you exercise more efficiently and healthily.

More features are in development. . .