You can use the following functions.

1. On the one page, Showing the competitive game score of your OverWatch friends.
It is automatically refreshed and gives a notification to you.

2. Showing the score graph for the all seasons.
You can remember the day when achieving level-up.

3. Messanger
The messanger function is useful to invite friends to on-line.
It is possible, even if you met them in Overwatch and do not know their phone number.

4. Link
You can move to the youtube channel of your OverWatch friends and show their best play.

Have a fun!
With your OverWatch Friends ^.^

P.S.
If you want to update the address of your youtube channel, please send your ID, hashcode, address to me.

My mail address :
[email protected]