iPhone 'Instant Growth Chart Percentile' Calculator updated: http://bit.ly/o65WIH.

In App Store search for Instant Growth Chart.

What's New in this Version 
1. Correct spelling error
2. Set Unit default to English
3. Set Sex default to Female
4. Minor code corrections for unit and sex defaults
5. Added 'Axillary - 35.5-37.0 °C (96-99 °F)' to 'Normal Range of Child Temperature' in Temperature Converter
6. Added Remarks when computed BMI and CDC BMI descriptions do not match.
7. Updated support documentation in website http://appluent.blogspot.com.

iPhone app 'BMI+ CDC Percentile Calculator' has been updated: http://bit.ly/nHBTLX.

In App Store, search for BMI+ CDC.

What's New in this Version
1. Correct spelling error
2. Set Unit default to English
3. Set Sex default to Female
4. Minor code corrections for unit and sex defaults
5. Added 'Axillary - 35.5-37.0 °C (96-99 °F)' to 'Normal Range of Child Temperature' in Temperature Converter
6. Added Remarks when computed BMI and CDC BMI descriptions do not match
7. Updated support documentation in website http://appluent.blogspot.com

Isolated Issues Using Instant Growth Chart Percentile

There are isolated issues during prolonged use of the Instant Growth Chart Percentile app. To resolve the issue, please follow the instructions below:

1. Delete the 'Instant Growth Chart Percentile' app from memory by double tapping the home key
2. Find for the 'Instant Growth Chart Percentile' icon then tap and hold it for a few seconds
3. Once the 'Instant Growth Chart Percentile' icon shows a '-' (negative) on the upper left, touch it again to delete it
4. Once the app is removed from memory, go back to the Instant Growth Chart Percentile app to use it normally.
 

Remarks Regarding BMI and CDC Percentile Descriptions Inconsistencies

There are several combinations of sex, age, height, weight, and BMI values that will result in inconsistent BMI and CDC Percentile descriptions. This is normal. These inconsistencies are common in the lower age ranges.

1.     BMI uses a well defined and established formula:

Metric: Weight in Kilograms / Height in Centimeters / Height in Centimeters * 10000

or

English: Weight in Pounds / Height in Inches / Height in Inches * 703

2.     CDC BMI values their descriptions are based on a series of percentile curves that illustrate the distribution of selected body measurements in children.

As an example:

Sex: Male

Age: 6 years old

Height: 48 inches

Weight: 60 pounds

Results in:

BMI Description: Underweight

CDC BMI Description: Obese 

References:
http://www.cdc.gov/growthcharts/who_charts.htm
http://www.cdc.gov/growthcharts/percentile_data_files.htm

How to Use BMI+ CDC App

Once you purchased and downloaded the 'BMI+ CDC' app from the Apple App Store or iTunes, you can use it to determine BMI percentile data for children and adult ages 2 years and above.

After measuring your or your child’s height and weight, 'touch' the unit (Metric or English) and sex, enter the age, height, and weight. For metric units, use kilogram for weight and centimeter for length. For English units, use pound for weight and inch for length. Enter parameters according to the unit of measurement selected.

To exit the virtual decimal keypad, touch anywhere outside the values entered.

Once satisfied with your entries, touch 'Calc' button to display the results. BMI has alerts to show valid values if you entered out of range values.

Determining BMI Classification

Computed BMI Percentile Data

BMI < 18.5 - Underweight

BMI >= 18.5 and <= 24.99 - Normal Weight

BMI >= 25.0 and <= 29.9 - Overweight

BMI > 30.0 - Obese

CDC Percentile Data

3rd Percentile - Underweight

5th, 10th, 25th, 50th, or 75th Percentile - Healthy Weight

85th or 90th Percentile - Overweight

95th or 97th Percentile - Obese 

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Instant Growth Chart Percentile and BMI+ CDC Apps Comparison

The Instant Growth Chart Percentile app is for infants and children from birth to 20 months. The data is taken from WHO as suggested by CDC. It can classify the child's percentile if underweight, normal, obese, etc. without having to plot the parameters using the WHO charts.

The BMI+ CDC is for children and adults from 2 years old and above. It uses the normal BMI computation and in addition classify that BMI result if underweight, normal, obese, etc.

If you bought the Instant Growth Chart Percentile, you don't need to buy the BMI+ CDC as it is included in the Instant Growth Chart Percentile app.