KaraFun vs UltraStar Deluxe

KaraFun is a karaoke service for singing together, with singing battles and music quizzes on Android, iOS, macOS, web, and Windows. Its free plan includes free songs, Premium song previews, access to try features, and one quiz. Premium costs £7.99 a month and adds all songs, playlists, offline sync, unlimited quizzes and Battle, and remote connections for up to 20 people. Singers can adjust key and tempo and select lead, backing, or guide vocals; guests can browse the catalog on a smartphone and add songs to the queue. KaraFun says it adds more than 400 new karaoke songs each month. Offline Sync can keep up to 1,000 songs on a device. Vocal Match compares a user's voice with songs and is available only on iOS and Android. Premium is for private use; professional or public performances require a professional subscription. Pro costs £39.99 a month and includes a commercial license and sound recording rights coverage with synchronized lyrics for its licensed catalog. Public performance royalties remain the customer's responsibility. One account can be used on only one device at a time, though the app may be installed on multiple devices.

UltraStar Deluxe is a free, open-source karaoke game for Windows, Linux and macOS. Players sing and score points based on pitch and rhythm, and can create their own songs. Party mode supports 8–12 players divided into two or three teams. The maker says more than 10,000 songs are available; players can also use DRM-free audio files or music stored on their computers. SingStar microphones work with the game. Users can create themes and download community plugins, free songs and code patches. Lua plugins are supported, with the .usdx extension and placement in the plugins directory required. The Official UltraStar Song Format is shared with partner games and song editors. Listed minimum requirements include a 1GHz CPU, OpenGL 1.2, 512MB free RAM and 200MB disk space, plus room for songs and videos. The downloads page lists version 2026.9.0 and links to an installer, release notes and source; Flathub and AUR are alternative installation methods. Audio devices do not have plug-and-play support, so the game must be restarted after a new device is connected.