What can a tracker tell you?

A record helps you describe what happened

A tracker can preserve the amount and unit you entered, show what you logged and help you bring an accurate history to an appointment. An empty record means “not logged”; it does not prove you missed a dose.

A change is not a cause

You sleep longer after starting something new. Was it the new treatment, less stress, a different schedule or ordinary variation? A before-and-after chart cannot separate these explanations.

Missing days make that question harder. They should stay missing rather than become zeros. A median describes the middle recorded day, not every day you lived.

Use the limits

Look at how many days were recorded in each window. Read the gaps and other changes alongside the result. A chart can support a conversation; it cannot tell you to change a treatment.