The app itself will work in different ways with compatible games, for example with Splatoon 2 it was announced that the app will give users access to a new feature called Splatnet 2.
The Nintendo Switch Online smart device app is designed to enhance your online experience for compatible games on Nintendo Switch. This app will launch alongside Splatoon 2, in advance of the official start of the Nintendo Switch Online service in 2018.
More Information from the dedicated Splatnet 2 web page:
The app will work with compatible games in different ways. In Splatoon 2, for example, it will give you access to SplatNet 2, where you can see your online battle stats, your gear, and much more.
SplatNet 2 is an ink-redible service that allows you to view battle results, online records of the weapons you’ve used and stages you’ve played on, alongside your progress in Hero Mode. You can even share these records on social media!
Just how fresh are you?
In addition to online battle results, you can check out the weapons and gear that other Inklings you’ve played with have used. You can check out records for any weapons you’ve used or stages you’ve played on as well. It’ll come in handy when you want to analyse your strengths and weaknesses!
And it’s not just stats for online matches; you can also check out which stages in Hero Mode you’ve cleared and how quickly you got through them! Make sure you show off your freshest records to your friends via social media!
You might even get some special rewards based on how much ink you’ve sprayed in battles…
Find out what stages are coming up!
The stages in Splatoon 2 change every two hours and you can view all upcoming online stages for the next 24 hours in advance.
Welcome to Annie’s ‘SplatNet Shop’
Annie is planning to open an online store called ‘SplatNet Shop’! When it does, you’ll be able to order gear using in-game money, and then pick up your purchases next time you play!
The store is still getting ready for its grand opening at the moment, but should be available in a future update so check back soon!
If you want to connect with other fresh players, then the Online Lounge feature is for you.
Use it to invite friends to battle online, and enjoy voice chat with them through your smart device while you play.
Invite friends to join your online battles using your smart device. You can quickly invite them via social networks or messaging services, or by simply selecting someone you’ve registered as a friend on your Nintendo Switch.
You can enjoy voice chat with friends in the Online Lounge.
In a private battle, everyone can talk together before they split off into teams. Once the teams are formed, it’ll switch so you’ll only talk to other players on your team.
The system will automatically switch who you’ll chat with depending on the situation!