As a cross-platform service, WhatsApp text messaging app is preferred than iMessage for lots of users to chat and share photos and videos. For example, you can easily share a video from an iPhone to an Android device. Now people would like to reply to WhatsApp texts and do small tasks on their Apple watch. However, the official WhatsApp Messenger app is not supported on the wearable device since now.
The screen of Apple Watch has very the small size, so it is not perfect to send photos, documents, or other advanced features with whatsapp. And you can not also install WhatsApp Messenger app on such wearable device. But you could try a partial solution to reply to Whatsapp incoming messages.
How to Reply WhatsApp incoming Messenger on Apple Watch
* On your iPhone, make sure you have installed the latest version of WhatsApp message app.
* Tap on the Settings app from Home screen, go to Notifications > WhatsApp Messenger, and enable Allow Notifications and Show in Notification Center.
* Return to Home screen, tap on the Watch app to open it. Tap on My Watch tab at the bottom, and tap on Notifications. Scroll down to find the WhatsApp, and move its toggle to ON.
* On your Apple watch, you must disable the Do Not Disturb mode.
Press the Digital Crown to get to your watch face. Swipe up to bring up Control Center. Tap on the Do Not Disturb button to turn it off completely.
Once somebody have sent Wathsapp to you, the message will appear on the watch screen and you can easily tap on Reply button to at least respond to it.