Notify.cs

using System;
//using System.Collections; | Probably not needed
//using System.Collections.Generic; | Probably not needed
//using UnityEditor; | Probably not needed
using UnityEngine;

public class Notify : MonoBehaviour
{
    private string title = "Ballsack is warmed";
    private string content = "Do your 20 push-ups for today!";

    // Start is called before the first frame update
    void Start()
    {

#if UNITY_IOS
        UnityEngine.iOS.NotificationServices.RegisterForNotifications(UnityEngine.iOS.NotificationType.Alert | UnityEngine.iOS.NotificationType.Badge | UnityEngine.iOS.NotificationType.Sound);
#endif

    }


    private void OnApplicationPause(bool pause)
    {
#if UNITY_IOS

        UnityEngine.iOS.NotificationServices.ClearLocalNotifications();
        UnityEngine.iOS.NotificationServices.CancelAllLocalNotifications();

        if (pause)
        {
            DateTime dateToNotify = DateTime.Now.AddSeconds(30);

            UnityEngine.iOS.LocalNotification notif = new UnityEngine.iOS.LocalNotification();
            notif.fireDate = dateToNotify;
            notif.alertTitle = title;
            notif.alertBody = content;

            notif.repeatInterval = UnityEngine.iOS.CalendarUnit.Minute;

            UnityEngine.iOS.NotificationServices.ScheduleLocalNotification(notif);
        }
#endif

    }


}