Hi Henry,
The answer is yes. With QuickCapture variables, you can calculate the start and end time of the captured line/polygon, length of the line/polygon in meters, miles, or kilometers, and area of the captured polygon in square meters, square miles, or square kilometers.
To do this, you will first add a field for the line feature layer, e.g. add a field "distance", field type is Double. Back to your QuickCapture project, assign the corresponding device variable to this new field (see screenshot below). Save and download the project. When capturing the line feature, the app will calculate the distance info and send it back to the feature layer later on.
If needed, add more fields to the feature layer and assign device variables from your QuickCapture project.