Nintendo Online app launching July 21st
http://www.nintendo.com/switch/online-service/
"This paid service lets Nintendo Switch owners enjoy online multiplayer gaming as well as a dedicated smartphone app that connects to your Nintendo Switch system and helps you connect with friends for online play sessions in compatible games."
Check back for more details on the service before the official launch."
"Nintendo Switch Online app
The Nintendo Switch Online smart device app is designed to enhance your online experience for compatible games on the Nintendo Switch™ console.
This app will initially launch with a limited feature set and will be compatible with the Splatoon™ 2 game.
In Splatoon 2, the app will give you access to SplatNet 2, where you can see your online battle stats, your gear, and much more. See details here.
Invite friends and voice chat during games
With the app, you can send online play invitations to players on your Nintendo Switch system's friend list. The app also lets you quickly send invites via social networks and messaging services. When you're invited to a game, you'll get notified right away via a push notification on your smart device.
Once players are connected, you can use voice chat openly with friends while in the online lobby and during online play (depending on the game)."
____
Guess it makes sense, given that Splatoon 2 will be releasing as well. The whole setup still seems a bit convoluted, but I guess we'll be able to see how it feels to use in real-time soon enough.