Yeah, around here (rural area) we get a lot of Helo's below 500 feet. Most of the time IMO they do not need to be that low. This is one reason in favor of the new rule proposal for remote ID. On the other hand have you tried the app "Flight Radar 24" ? I've been using this for a while and seems to be pretty accurate. The delay - depending on cell service, seems to be about 5-8 seconds. I myself would prefer that the LAANC app and and app like I just described be instituted for all pilots rather than requiring Remote ID.