Smule is described as 'Join the global karaoke party! Sing your favorite hits with sound effects. Sing video duets with featured artists like Jessie J, Jason Derulo, and Linkin Park. Share your versions with our 50M+ global audience and get fans!' and is a Karaoke Player in the audio & music category. There are more than 10 alternatives to Smule for a variety of platforms, including Android, Windows, iPhone, Mac and Web-based apps. The best Smule alternative is Wondera, which is free. Other great apps like Smule are KaraFun, Karaoke Mugen, UltraStar Deluxe and Kanto Karaoke.
Makes your Windows Phone a full featured portable karaoke machine. You can start to sing in a few seconds. You can choose from several hundreds of free songs from online library or you can use your own songs from your SkyDrive.
UltraStar Play is a free and open source singing game. The game plays an audio file, displays lyrics, notes, and optionally a background video or image, while the players sing along to earn points.
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