YaaRobot can help you reply and answer the huge audience automatically when they message you. This tool is a utility tool for WhatsApp. You can create messaging rules in the application and schedule them and decide how you want to respond to specific contacts. We simply process your scheduled messages using open option given by them on notification panel to direct reply.
Note: We are not collaborated with WhatsApp in any way. WhatsApp is the registered trademark of WhatsApp Inc.