You can add apps to your Apple Watch directly through the Watch's App Store, or through your iPhone's Watch app.

The Apple Watch may not be a necessity, but once it's on your wrist, it quickly becomes an indispensable companion. Acting as a natural extension of your iPhone, the Apple Watch lets you check ...

I recommend these features and settings to everyone who's just set up a new Apple Watch or wants to get more out of the one already on their wrist.