Vocacolle is a music streaming app that offers several features to enhance the user experience. One of its key features is background playback, allowing users to listen to audio while using other apps or browsing the web. Additionally, Vocacolle offers a unique Chorus Medley feature, where users can listen to rankings and favorite playlists in a medley format with just the chorus, similar to a music introduction program. Users can also enjoy immediate listening without membership registration, as the app can synchronize with niconico's My List for users with a niconico account. Another notable feature of Vocacolle is its comfortable enjoyment of The VOCALOID Collection, as it is fully linked with the vocaloid culture festival. This allows users to easily access and enjoy new works and projects. The app also offers fast and smooth audio playback with crossfade, ensuring seamless switching between works. Users can create unlimited custom lists to organize their favorite videos and playlists. Additionally, Vocacolle provides music-specific rankings, allowing users to check their favorite videos from categories such as VOCALOID, singing, and playing. Vocacolle also offers recommended autoplay, where users can continuously play recommended works related to the one they just listened to. This creates an auto playlist-like experience, allowing users to discover and enjoy related content effortlessly. Furthermore, users can enjoy continuous playback from the mobile version of the music discovery service Kiite by pressing the "Continuously play with vocacolle" button on the playlist screen. Niconico is Japan's largest video service, consisting of various services such as Nico Nico Douga and Nico Nico Live Broadcasting. It offers a unified interactive communication experience through comments, allowing users to engage with the content they are viewing. By registering as a free member, users can enjoy additional features and benefits when using the service. Nico Nico Douga is a service that allows users to add comments to videos played on websites or in apps. This feature enhances the viewing experience by enabling users to share their thoughts and enjoyment with others. Nico Nico Douga covers a wide range of content, including music performances, karaoke, background music, game music, Japanese and Western music, anime songs, voice actors, and more. Users can also access the latest anime currently airing on TV for free through this service.