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1. I need a web application to send bulk whatsapp messages (From Different WhatsApp Account) containing text, image or video, and receive messages as well.
2. Allow me to upload contact list via csv or excel.
3. Must compare new uploaded phone number and compare new ones with old ones, then delete duplicate phone number.
4. Scheduling mechanism.
5. the application should be able to identify contacts with whatsapp accounts and send messages accordingly, messages must be sent only to whatsapp contacts.
6. report interface shows how many phone numbers have whatsapp, how many whatsapp are successfully sent, how many are not sucessfully sent, and how many received.
7. intuitive and informative interface would be very appreciated.
8. the application must be able to handle large recipient list without raising any alarms.