“Importantly, what3words’ iOS and Android apps work offline, without a cellular connection.”
How then? How do you let someone know where you are if it has no connection? 5G satellite tracking that was just a conspiracy theory? Even wikipedia does not say how it makes a connection.
It is a false statement... It does not work without a connection.
“To know and share your 3-word location, you need access to a smartphone that also needs GPS and an internet connection, which aren’t readily available, especially for people in poor and rural areas.”
https://www.makeuseof.com/how-does-what3words-work/