We are working on auto (license plate as id) based messaging mobile app and searched for if any successful app exists before. What we have found so far:<p>1-) www.bum.com : last news from 2011 seems to failed.<p>2-)https://play.google.com/store/apps/details?id=com.marzki.reparkapp seems to be inactive.<p>3-) http://platewave.com/ focus on dating and UK only and only web and mobile app.
What would be the purpose?<p>Chatting with people? This is what a normal messaging app does.<p>Chatting with nearby cars? You'd need geolocation accuracy to be continuous and very precise. Waze, a navigation app, allows crowdsourced submissions about traffic info, police, etc; it's goal-oriented and works.<p>Nintendo 3DS consoles will interact when they're in proximity. That's goal-oriented and works.<p>Several normal chat networks, like Snapchat, allow you to locate nearby users when they're in geolocation mode.<p>General purpose, semi-anonymous neighbor chat is just not that big of a market (yet), even when you discount a focus on cars. Yik-yak was similar by offering geofenced anonymous chat based around fixed (in real-world) locations, but they just pivoted away from anonymity.