More than a year ago I was hugely frustrated by being unable to use it due to a demand to log-in.
Most of this area has no cellphone coverage at all so doing that was a non-starter unless home on wifi.
I reverted to an older version then and have not changed since - so not sure what restrictions exactly are now included, hopefully it is more sophisticated.
I know you can use the app acquire a code and unlock a small area if you know it is actually safe at low altitude for example.