Unity: tap in place?

Question

Unity

Such a thing - it is necessary to determine the tapas on the screen, and those that occurred in one place.
That is, a person tapped on the screen without moving his finger anywhere.
There is a tapCount, but it works for any events with a touch, that is, it disappears.
So far, I made a crutch for myself in the form of something like this:

private Vector2 m_StartTouch;

void Update () {
    if(Input.touchCount > 0) {
        Touch touch = Input.GetTouch(0);
        if(touch.phase == TouchPhase.Began) {
            m_StartTouch = touch.position;
        } else if(touch.phase == TouchPhase.Ended) {
            Vector2 endPosition = touch.position - m_StartTouch;
            if(endPosition.magnitude <= 0) {

            }
        }
    }
 }

That is, I just look at the length of the wheelbarrow, if it is more than 0, it means they drove around the screen.
However, I hope there is a better way to do this, because a similar definition is used in several scripts with different conditions.