It's easy to forget the Switch Online smartphone app is a thing. The last major update it received was tied to the Super Smash Bros. Ultimate stage builder and since then it's got a handful of updates making some minor adjustments and changes. Prior to this, support was added to the app for Splatoon 2.
Although it's not got the best reputation, it seems like Nintendo will be sticking with it as a communicative and social tool. On the same official game page for Animal Crossing: New Horizons that mentions "in-game purchases", there's a section below this that confirms it will support the Nintendo Switch smartphone app.
As noted, Nintendo has already rolled out an update for Smash Bros. and Splatoon 2. Both these games are community-driven titles, so it makes a lot of sense for Nintendo to support Animal Crossing as well.
Unfortunately, it hasn't been revealed how the app will interact with Animal Crossing. There's some speculation over on Twitter, though, that the game might receive its own application within the app, or that it could potentially be used to support in-game voice chat. Some other fans are hoping it allows players to scan QR codes.
How do you think Nintendo's Switch Online app will support this upcoming release? Have you used this app previously? Share your thoughts below.