WhatsApp Scheduler (Batch 15s) is a Chrome add-on designed to enhance the functionality of WhatsApp Web by allowing users to schedule multiple messages in batches with specific intervals. This tool enables users to send their messages with a 15-second gap, ensuring a smooth and organized communication process. It also features a quiet hours setting, restricting message scheduling between 9 AM and 9 PM, which can help manage communication flow during off-hours.

Additionally, the application includes safety features such as duplicate prevention and job status tracking, providing users with a clear history of their scheduled messages. The permissions required by the add-on are straightforward, allowing it to open WhatsApp Web, schedule messages, store pending jobs locally, and send notifications regarding the status of sent messages. With a focus on data privacy, all information is stored locally without external transmission.