Case tracker is very reliable. I found out there was a change in my account through that app. I work Night Shift so it became a game to refresh my app after midnight. On the 3rd I refreshed my app screen at 5 mins past midnight, no change. But I did it again a 1:30am and that’s when it change my AR date to 2/3/23. So I logged into my account and found my approval under documents tab. Lawfully registered the change at 5pm and I just got an email from uscis today. So case tracker is on point.😊