Harmony Helper is a mobile app for vocalists that provides the convenience and control of a 24/7 digital rehearsal room, revolutionizing the way you practice your vocal performance by providing real-time feedback. Matching the vocal charts found at PraiseCharts.com, purchase the practice file for yourself, or buy additional copies and share them inside the Harmony Helper app so your band or choir can learn their parts confidently from their own devices! Download the app and start a better practice now! (No app subscription required for PraiseCharts-purchased songs.)