Michael Bradley

Sifter is an iOS chat app that connects people who are physically in the same place. Instead of a global feed or a friend graph, every conversation lives inside a geofence — a precise geographic boundary tied to a venue, event, or public space. When you walk into the area, the room appears. When you leave, you leave the chat. Powered by 702 AI Services, the app is designed for the moments social media has flattened: the line at a coffee shop, the crowd at a concert, the audience at a conference, the study lounge on a campus. Sifter turns the place itself into the social network. Every account is verified by SMS to prevent spam and bots. Location is used only to determine which rooms a user is inside — coordinates are never shared with other users, and conversations are not archived. There is no remote access and no follower system. Sifter is free on the Apple App Store. iPhone required.