Input.GetAccelerationEvent

Description

Returns specific acceleration measurement which occurred during last frame. (Does not allocate temporary variables).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Update() {
        Vector3 acceleration = Vector3.zero;
        int i = 0;
        while (i < Input.accelerationEventCount) {
            AccelerationEvent accEvent = Input.GetAccelerationEvent(i);
            acceleration += accEvent.acceleration * accEvent.deltaTime;
            ++i;
        }
        print(acceleration);
    }
}