Camera follow Player Car - 2d game

I want my camera follow to my Player Car. But its not showing smoothness in actual device. There is no problem of FPS because its really small game. So definitely its camera movement related issue.

In Unity editor its moving nice but on actual device movement was not that much good so that I can say smooth. Here is my simple code that I was using:

 void Start ()
     {
         offSet = target.position - transform.position;
     }
 
     void LateUpdate ()
     {
         Vector3 cameraPosition = target.position - offSet;
         cameraPosition.x = 0f;
 //        cameraPosition.z = -10f;
 
         transform.position = cameraPosition;
 //        transform.position = Vector3.Lerp (transform.position, cameraPosition, Time.deltaTime * smoothness);
     }

There are many camera following related code exist but those are really complex so I don't prefer those. I want really simple that understood by every one clearly.

Please give me some suggestion for this.

EDIT: Now some sort of time spent with same, I have following code but its still require improvements.

float smoothTarget = Mathf.SmoothDamp (transform.position.y, target.position.y - offSet.y, ref velocity, smoothness); Vector3 cameraPosition = transform.position; cameraPosition.y = smoothTarget; transform.position = cameraPosition;

Still there is noticeable jerks in movement.