As a Kankyo Kaizen hack for the tracker, the tracker should allow a default for the date range. Repeatedly having to set this value everytime one looks at a tracker is extremely inefficient. When multiplied by the number of trackers people use that need a different view than the last 14 days, the amount of time becomes substantial.

For example, who wants to view a weight tracking chart on a 14 day scale. That would typically be only 2 measurements. Most would want a default of 3 months or greater.