Most habit apps count your streaks. Nexus models why they break. Nexus maps the causal structure of your behavior as a living, interactive graph. Each node - a habit, decision, attitude or state - is connected to others and decays over time when you stop reinforcing it. Silence is data too. Check in through an AI-Powered journal. Nexus analyzes you entires, detects patterns, updates your graph and simulates where you current trajectory leads in 30 or 90 days. No generic advice. No streaks.