Checkmate is an AI-powered accountability buddy for building habits. You set a goal and a weekly success target, log quick daily check-ins, and once a week Checkmate phones you for a short, friendly conversation about how it went. The AI already knows your logged progress before it calls, so the call focuses on what helped, what got in the way, and your plan for the coming week. It is available as a web dashboard and as an iOS and Android app.