WhatsApp brings Android Wear support out of beta

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.
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