KaraFun vs OpenKJ

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.

OpenKJ is open-source karaoke hosting software for karaoke DJs, built and tested for Linux, macOS, and Windows. It integrates with OpenKJ Songbook, which supports web-based song search and submissions. Singers can use Songbook apps for iOS and Android to browse or search a songbook, submit songs with requested key changes, and save favorites. The web submission site can also serve as a venue kiosk, and sign-up requests are sent directly to the host computer. Songbook can optionally display download-vendor catalogs; the project says these are updated daily. OpenKJ SongShop supports purchasing and downloading karaoke files on the fly, with PartyTyme listed as the only available vendor. OpenKJ Tools provides utilities for ReplayGain adjustment, archive handling, zip compatibility, and filename capitalization. Those tools are marked experimental, and the project recommends backing up the library before using them. OpenKJ is free; Songbook starts at $9.99 per month and has a one-month free trial.