Reset Option

I have added an options button to the landing page. From the options page you can click the Reset button. This will remove all the weights that have been collected so far. There will be nothing to show on the weight chart.
After a period of time, the chart becomes full of data, from several months ago. This option means that the user can concentrate on recent data. Also they don't have to go to the Weight list and remove them all one by one.

A more sophisticated reset could be created to remove the oldest month. Or even make it automatic so only 3 months are tracked.