Ok, I can confirm that this unit works with the USB ELM327
out of the box. However, I did notice some connectivity issues when closing the app and re-opening it, and what seemed like missed data while it's running. I'll have to play with it more in the next few days. I had very limited time with it today. Perhaps I may need to try a different USB ELM327 unit.
Other than that, the interface is very responsive and much better than the clunky OEM Subaru one.
