The app is a perfect little settings config panel for tweaking the EQ.
You dont need to download it if you dont want to.
I was apprehensive reading all the negative reviews but they seem to be related to setup RT*M issues. As long as you pair with your phone before using it there is no confusion. It wont walk you through going to Bluetooth settings to press the connect button, but if you dont need that help, Kudos and enjoy a great product.
The manufacturers made a mistake by triggering the suggested download on pairing, making the average user assume you NEED this app. If you WANT this app for config changes or firmware updates, download it.
Its simple, fast, and looks great.
Xoomin about UE ROLL