99Mastery is a free Chrome extension designed to enhance communication within WhatsApp groups. This tool allows users to send messages to multiple groups without the need to save contacts, making it ideal for businesses, community managers, and users who manage several groups simultaneously. Key features include message scheduling, customizable templates, intelligent segmentation, and support for various content formats like text, images, voice notes, videos, documents, and locations.

The extension provides real-time tracking of message status and allows users to export their activity history as needed. With features like efficient bulk sending, reusable templates, and smart organization of groups, 99Mastery optimizes the messaging process, ensuring quick and precise communication. It is designed to be private and secure, with no personal data collection beyond what is already on the user's device.