You are downloading Sing! Karaoke by Smule 6.3.3 APK file latest free Android App (com.smule.singandroid.apk). Sing! Karaoke by Smule is a free Karaoke app which is rated 4.20 out of 5 (based on 3 reviews). Sing! Karaoke by Smule can be downloaded and installed on Android version 4.3 (Jelly Bean) and above. Sing your favorite songs with audio effects and video filters.