Chords for Pal – Official Remix | Jalebi | Arijit Singh | Shreya Ghoshal | Rhea | Varun | Javed - Mohsin (). 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.