Milepost is a driving journal for your car on iOS, with an MCP server for ChatGPT, Claude, and other compatible AI agents. Record routes, photos, notes, music, and moments in Roadbooks. Share with friends for reactions and comments, or send a public web link. Build your garage, collect city and state stamps in each car’s Stampbook, relive routes in 3D, and make animated shares and monthly recaps. Record for free; Pro unlocks older history, exports, and deeper insights.