https://www.polygon.com/2018/11/1/18051772/super-smash-bros-ultimate-app-nintendo-switch-online

During today’s Super Smash Bros. Ultimate Nintendo Direct, the publisher announced Smash World, a supplementary service for the upcoming fighting game. Smash World will be accessible through the Nintendo Switch Online app on smartphones and tablets.

Unlike many apps for competitive multiplayer games, the app won’t focus on displaying win/loss records. Instead, the service will allow players to upload and view gameplay videos. Other features of the service have not been announced, but Nintendo says Smash World will receive updates post-launch.