I have no idea on the subject but from what I can tell you is that, I have bought a few diffrent blue tooth headsets for work. The cheap ones never worked all that great. I now have a motortrend mt-5000 hedset that I bought at a truck stop for around $90 I think it was. And it works great very clear and loud at times, I have to turn down the volume on it.
If theres no such app you may have to try a diffrent bluetooth.