I've been thinking of creating a proximity based chat app for awhile now
The idea is you could chat with people near by you when the app is active. Would anyone be interested it something like this?
Here's an obligatory mail chimp landing page in case anyone is interested.
Telegram released this:
https://www.gsmarena.com/telegram_update_adds_people_nearby_an_locationbased_chats-news-37746.php
And it is probably the least popular feature they have :-P
Already built :D
https://apps.apple.com/us/app/bridgefy/id975776347