game freezes on devices but plays well on pc.

Questions & Answers
1

Hi.i’ve build a game and it plays with no problems on pc and android simulator but when i test it on devices it freezes when the bullet prefab collides with the enemy.it goes down to 1-2 fps or smth or sometimes it randomly freezes.What can be the cause?
devices tested:iphone 6s, samsung galaxy s6.

2

so the problem was my enemy’s health bar script

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class MonkeyHealthBar : MonoBehaviour {

    public float fillAmount;
    public float tempHealth;
    public float maxHealth;
    
    public monkey monkeyScript;
    public Image content;

    void Update ()
    {
        tempHealth = monkeyScript.tempHealth;
        maxHealth = monkeyScript.maxHealth;
        fillAmount = tempHealth / maxHealth;
        content.fillAmount = fillAmount;

	}
}

does anyone know the reason??
@aditya007 @Landern