Open Sky seems to have more detailed shaded areas. A lot of it is orange and says "Fly Under Conditions" and lists an airport or heliport nearby.
What does that mean, you ask them permissions to fly at a specific time in those areas and if you get their permission you can fly there?
A lot of these Orange zones have several entities listed or area labels, like hospitals. Do you need to contact each entity?
Looks like a number of contacts so would you seek permissions for each of these orange zones you want to fly in?
Some of those CASA apps are more for commercial type RePL pilots, flying close to / in restricted areas at times.
Not sure if you are rec pilot only, but sounds like it ?
I have 2 of the CASA approved apps on my phone, Airmap and Opensky.
Opensky is the one I normally check, and Airmap just to verify if unsure about a location.
Opensky has 2 general coloured zones, red for controlled airport zones (no fly or altitude restricted new flight paths), and orange for uncontrolled airport / heli, sometimes special zones around red zones.
You do of course get TFR red zones for fires, accidents etc to keep the airspace clear.
Just move the map so your location is where you wish to fly, look below in the info area text, it will tell you what the deal is for that location and nearby.
Move the map onto nearby zones, check info, avoid if info lists restrictions to whatever altitude etc you may be flying.
So, red zones no fly. Simple.
Orange on fringes of red zones are usually height restricted, eg Adelaide airport fringe orange restricted to 90m.
Orange zones near uncontrolled airports, heli pads etc, you can fly as normal up to 120m (the app will tell you), and as per the notes below 'Use Caution' . . . 'Operating near known heliport (or uncontrolled airport), keep clear of flight paths, safely land if you become aware of aircraft operating in the area' types of messages.
Yes, a lot of Sydney skies are no fly, but areas here and there you can in between most of the larger areas.
So orange zones ok, be very aware near the big hospitals though, lots of heli air traffic there at times, but you usually hear them from well off.
Flying VLOS in these areas is very important so you can react accordingly.
Have fun.