Based on our record, UltraStar WorldParty seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Anyway, this site (https://ultrastar-es.org/en) is probably your best bet for the app and music. Source: about 2 years ago
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
Synk.io - Source music directly from professional producers worldwide
Vocaluxe - Vocaluxe is a free and open source singing game, inspired by Ultrastar (Deluxe) project. It allows up to six players to sing along with music using microphones in order to score points, depending on the pitch of the voice and the rhythm of singing.
Fyre - On-demand platform for celebrity booking.
KaraFun - KaraFun is the best online karaoke. Over 35,000 karaoke songs, with studio quality, at home or on the go. Regular updates. Free demo!
Sonicbids - Sonicbids helps bands get gigs, and people book bands.