Simple gyro phone rotation in Unity

GyroInput

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GyroInput : MonoBehaviour {

    Gyroscope m_Gyro;

    public float speed = 0.1f;
    float hRotation = 0.0f;    //Horizontal angle
    float vRotation = 0.0f;   //Vertical rotation angle of the camera

    void Start()
    {
        //Set up and enable the gyroscope (check your device has one)
        m_Gyro = Input.gyro;
        m_Gyro.enabled = true;
    }

    private void Update()
    {
        hRotation -= m_Gyro.rotationRate.y * speed;
        transform.Rotate(Vector3.up, hRotation);
    }

    //This is a legacy function, check out the UI section for other ways to create your UI
    void OnGUI()
    {
        //Output the rotation rate, attitude and the enabled state of the gyroscope as a Label
        GUI.Label(new Rect(500, 300, 200, 40), "Gyro rotation rate " + m_Gyro.rotationRate);
        GUI.Label(new Rect(500, 350, 200, 40), "Gyro attitude" + m_Gyro.attitude);
        GUI.Label(new Rect(500, 400, 200, 40), "Gyro enabled : " + m_Gyro.enabled);
    }
}