Should recalculate automatically

After the initial inputs when a new weight is entered it should automatically recall the BMI and other things. A zoomable graph would be nice. Hover over graph points with weight and weight difference from previous point would be great. It does the job awkwardly.

Housebuyer about Fitter Fitness Calculator & Weight Tracker - Personal Daily Weight Tracker and BMI, BMR, Body Fat% & Waist to Hip Ratio Manager, v1.3.8