Thanks for posting about this app, Lyman. Very useful tool with a fascinating backstory. If you're interested check out Chris Sheldrick's TED Talk "A precise, three-word address for every place on earth"
I used this recently the app to help "reverse" locate from a photo where a good friend's ashes were scattered on Mt. Rainier (using W3W, Street View & Google Earth in Terrain mode.) ///duplicates.