I've had a better opportunity to try this out, a 45 minute drive on the highway.
The major problem is that when the app starts up it doesn't always read all of the PID's. It lists about 5 or 6. I have to shut the app down and try it again until it connects properly, then there's about 2 screens of PIDs listed and I get more information displayed.
In the Standard window I get RPM, km/h, Throttle, Engine temp and Engine Load displaying when fully connected, otherwise it's just RPM and Throttle showing.
It usually take a few tries to get it working, I would guess around 5-10.
In the engine section everything works except for Intake Air Temperature and Air Flow Rate, but, there had to be a but
there's another number between Intake Manifold Pressure and Air Flow Rate, it's not AFR because that shows n/a. This number varies a lot, anything from in the hundreds to several thousands, all over the place.
I get nothing at all from the Fuel side of things and there was a couple of times that the speed graph or maybe it was the rpm graph, I forget, but it seemed to lose it's function and went into a long slide down as if the speed or rpm was slowing, which it wasn't.
I like the app and when the bugs are worked out it'll be a great tool.
Bit of info: 2002 Dodge Caravan 3.3, Interface is an ELM 327 and Windows Phone HTC8x
I hope this helps.
Ray