How do I install Strong for Apple Watch?
You can download Strong for Apple Watch directly from the App Store on Apple Watch.
Otherwise, after downloading Strong on iPhone, if Automatic App Install is enabled, Strong will be automatically installed on your Apple Watch.
If Automatic App Install is Disabled
It is possible that Automatic App Install is disabled, which prevents Strong for Apple Watch (and other watch apps) from being installed automatically. (To turn this back on, go to Watch > General > Automatic App Install)