how to control swipe an object unity

i'm currently building a game in unity, i have a ball it has rigidbody i instantiate the ball in random places and i add addforce to it in y position to move up after w$$anonymous$$el the fall down because the gravity is true now when the ball is fall i want add addforce in x position to swipe left or right the problem is when the ball is go up or fall when i swipe the ball go diffrent position how i can control the swipe to move the same distance every time and not be affected by gravity, and i can swipe to left and right fast even the distance is small.