Two things you got to do:

1. Make an account with easports.com.  There is an extra step in that process where you join your account with your gamertag.  I did this so long ago that I forgot the exact steps.  Google it.

2. Search for the NHL 13 app in the Apple App Store.

 

What you can do:

1. Look at standings and stats

2. Submit trade offers and submit offers for free agents.

3. See injury report and upcoming schedule of games.