Finally you can send WhatsApp messages to any unsaved contact or directly to a phone number, without the need to save it in your mobile.
Ping2WhatsApp will cover you. It allows you to quickly send messages to any phone number which are not in your contact list. Use Ping2WhatsApp to send direct WhatsApp message to unsaved phone number. Its a convenient app for those who want to send a WhatsApp message to a number but they do not want to save the number to their contacts list.