Jotcall is a mobile CRM extension app designed to enhance productivity for salespeople and field technicians through intuitive interfaces and seamless integration with existing CRM software. It offers personal free and pay versions, and an enterprise version that allows for extensive data management and sync features, ensuring secure and easy access to critical information. The app's architecture leverages Android OS capabilities and integrates with popular CRM systems like Salesforce, SugarCRM, and VtigerCRM to provide users with reliable business tools on the go.