eVIN (electronic vaccine intelligence network) is a mobile-based supply chain management system in India that enhances the vaccine supply chain from national warehouses to primary healthcare centers. It features inventory and order management, demand forecasting, remote temperature monitoring, and asset management. Operating in over 27,000 primary healthcare centers across 750 districts, eVIN monitors around 40,000 refrigerators with remote sensors. The system provides interactive dashboards and analytics tools for real-time supply chain monitoring on both web and mobile platforms, with a primary focus on vaccination and immunization.