The TranzIt BLU iSimple App is a free Android app developed by AAMP Global. This app is designed to work with the iSimple TranzIt BLU Bluetooth audio interface and provides full control over the device. It has a simple interface that allows for infinite channel selection, auto power on/off, and manual on/off option.

However, this app is not required for basic operation of the iSimple TranzIt BLU and will not provide any benefit unless used with the device. It is recommended to visit a local retailer to purchase the iSimple TranzIt BLU if you are looking for a method to wirelessly play music through your car stereo. Overall, the TranzIt BLU iSimple App is a useful tool for those who already own the iSimple TranzIt BLU and want to have full control over the device.