670G App for Smartphone/Smart Watch?

Has anyone yet come up with an app that will receive the Guardian 3 transmitter data and show it on a smart phone or watch? I don’t want to interfere with the 670G getting the data, so it will remain in auto mode, just read it so I can see number on my phone or watch.
I am thinking there has to be something out there, but can’t find anything.
Thanks in advance,
-bob