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
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UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
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