How to save money

Hello, I’m making a mobile game and I don’t know how to save the amount of money I got.
I want when I exit the game, the game will be saved and when I join again I have the same amount of money I had before.
(like Temple run, Subway surf etc…)

Thanks.

THE COIN SCRIPT

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

public class CoinsScript : MonoBehaviour {

    private Animator anim;


    // Use this for initialization
    void Start () {

        anim = GetComponent<Animator>();

    }

	

    private void OnTriggerEnter(Collider other)
    {
        if(other.name == "Player")
        {
            other.GetComponent<PlayerMotor>().coins++;
            anim.SetTrigger("Collected");
            Destroy(gameObject);
        }
    }
}

I don’t know if you solved it already, but i think you need PlayerPrefs. You can use it to store coins or highscore and it’s saved even if you exit the game.