We have a desktop aplication (c#, dotnet 4.5) that sending bulk message to whatsapp using (chromedriver and whatsapp web). We need to add extra feachers. with same platform + source code of all liberaries.. First: add the next feachers to desktop application: - Extract contacts. - Extract groups numbers - Autoreply, depends on list of stored choices. - Number's filter (has whatsapp or not) - send messages to group or groups - Add multi channel optoin Second: Creating google extenction project Sending bulk messages with the same commen options of bulk whatsapp sender. Third: companct mobile application to send via whatsapp. we have an API that check if user account is active or not which will be used on chrome extension or mobile application. Note: All modules will be haneled with source code.