Dex serves as a personal Customer Relationship Management (CRM) tool, allowing users to effectively manage their contacts and relationships. By integrating with platforms like LinkedIn and email, Dex automatically syncs contacts and allows users to log essential details about them, such as interaction history and significant dates. The tool also provides reminder features to ensure users never miss an opportunity to reach out. Available through a browser extension and mobile app, Dex focuses on user privacy and offers options to export or delete personal data.