This app requires busy box installation because some binary files are required for Viper 4 android fx (V4A).
Viper 4 android fx is the best sound app of ViPER4Arise (V4A) for those who wants to listen to music in high quality with different profiles (Audio Effects).Get the Sound you Deserve with ViPER4Android.
Download and install this app. You well love V4A because it supports many features like modify audio settings of the app, A user can be paired device via Bluetooth and control the music. Also, it supports the internet access.
So download the viper4android on your android phone and start play songs in high quality.