In theory the Amiigo does what you want. In practice... well the device and software is pretty rough at the moment. I'd send you mine but I lost the shoe clip p

In theory the Amiigo does what you want. In practice... well the device and software is pretty rough at the moment. I'd send you mine but I lost the shoe clip part already and I'm not sure if it works w/o it (it complained every time I loaded the app about it being missing).