Hi All Been looking at HTML and have written a little app 'BMI calculator' It runs on tablets and half way decent phones, but it will struggle on low resolution devices. All the HTML, CSS, JavaScript and png's are in the zip file. BMI healthy weight calculator Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. Select your system (Metric or Imperial). Then enter your height and weight, and tap Calculate. Your BMI and what category you are in will be displayed, and this information is added to your history file along with the date. Your history is saved and reloaded each time you run the app, so if you are on a diet you can see how well you are doing. The history box is scrollable. See the BMI chart for additional information. Regards Roy