Show HN: Radar Chat – Leave Digital Messages in the Physical World

Radar Chat is an app that I've been working on for a few years now, but only during the past several months has it been my main focus.

Radar Chat allows you to leave messages attached to real world (lat/lon) locations. When leaving a message, you can decide if it'll be a whisper (small radius and long expiration) or a shout (huge radius and short expiration). Messages are organized into "channels", such as "foodtrucks", "garage-sales", etc.

It's intended use is for communicating anything that is timely and based on real world location. My first customer is an organization in Michigan that works with schools to promote STEM learning. Students can use Radar Chat to find and visit participating locations and check in. Each check in gives them an opportunity to win a raffle.

Let me know what you think!

Update: This post links to the marketing page with a bunch of screenshots. This URL will take you directly to the app/PWA:

https://app.radar.chat