Chords for KAUN TUJHE Full Video | M.S. DHONI -THE UNTOLD STORY |Amaal Mallik Palak|Sushant Singh Disha Patani (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.