Now, the app, as it resides in Google Play, has been updated with the usual “bug fixes and improvements,” messaging reliability, and official Android Wear support.
WhatsApp’s functionality with Android Wear is not outside of what we have already experienced with other messaging features on Android Wear devices like the LG G Watch and Samsung Gear Live. You can tap to view full message contents, navigate among stacked messages, and dismiss notifications with a simple swipe. There are ready-made responses you can choose to use too, and of course, you can voice reply or command the app to open in your phone.
If WhatsApp is your preferred messaging platform, and there is every reason to expect it is, but lack of native support for Android Wear has kept you from taking the plunge to pick up an Android wearable, or, you prefer not to side-load your apps, those obstacles have now been removed.
sources: Google Play via Android Police