You can use WhatsApp in addition to email or other forms of invite. Bee every access setting of the inquiry is WhatsApp invite available.
If you first invite respondents via email and then a WhatsApp message as a reminder, all respondents will receive a message. send you first a Whatsapp message and then an email? Then Survey will filter the completes out and only the incomplete ones are sent by e-mail.
Interested in a WhatsApp license? View more information about the possibilities.