"KuruKonai" is the Apple Watch stand alone App.

It tells you the person you wait will come or not.
Of course, it is tiny entertainment. Not serious.

Please turn the Digital-crown up and down.
If result was "come", the happy short animation will appear.
In a case of "won't", the unhappy one will cry for you.
And you can kill time while you wait for someone.

"KuruKonai" means "will come or won't" in Japanese.