Instructions apply to WhatsApp for iPhones with iOS 9 and later.
Get WhatsApp Notifications on Apple Watch
WhatsApp doesn’t include an official app for Apple Watch.
Here’s how to receive WhatsApp Messenger notifications on your Apple Watch.

On your iPhone, openSettings.
Scroll down and selectWhatsApp.
Turn on theAllow Notificationstoggle switch.

SelectShow in Notification CenterandShow on Lock Screen.
If you like, also turn onSounds,Badges,andBanners.
Scroll down to WhatsApp and turn onNotifications.

You’ll now receive WhatsApp notifications on your Apple Watch.
The functionality is limited.
you could’t start a new message, use voice messaging, or throw in a reply.

Chatify for WhatsApp on Apple Watch
Chatifyputs WhatsApp on your wrist.
sign on to WhatsApp on your iPhone.
Chatify for WhatsApp is not an official WhatsApp program created by Facebook.
As with all third-party applications, use caution when sharing your information.
Download Chatify for WhatsApp from the App Store on your iPhone.
OpenChatifyon your Apple Watch.
You’ll be presented with a QR code to scan using WhatsApp.
Open WhatsApp on your iPhone and selectSettings>WhatsAppWeb/Desktop>Scan QR Code.
With your iPhone camera, scan the QR code that displays on your Apple Watch.
WhatsApp messages now appear on your Apple Watch.
you might also reply directly from your wrist.
Dozens of applications in the App Store perform the same function as Chatify.
Without an official app, however, you should be careful to only install things from reputable sources.
FAQ
There’s no WhatsApp iPad app, butthe web interface functions as a workaround.
Launch Safari on the iPad and go to WhatsApp’s website, then open WhatsApp on your iPhone.
Go toSettings>WhatsApp Web/Desktop,and scan the QR code to start seeing WhatsApp messages on your iPad.
Close WhatsApp on your phone and use it from your setup.