It is rather inconvenient to add someone to your contacts, only to send them a single WhatsApp text. WhatsApp Direct allows you to send WhatsApp messages directly to the phone number, without saving it to your contacts.
Just select the appropriate country code, enter the receiver's phone number and the text message that you want to send, then click on the Send button. You will be redirected to the WhatsApp chat for that number, even though the contact is not saved on your device.
Note: The entered phone number should already be registered on WhatsApp, otherwise the message won't be received.
2. Whatsapp Android:
Download and install Direct-Whatsapp (Ad Free) in your android mobile