I don't see above where LB_3 or I actually named the brand of unit that we have. Or if we did, it was dissociated from the initial posts.
It's an OBD Fusion, which plays well with iPhone via Bluetooth.
The beauty of the device is that it plugs into the OBD port and lives there permanently. No switching on and off. No taking in and out.
The display is customize-able. On our recent trip, we had an issue with a turbo hose coming loose and the van going into limp mode, and so LB_3 created a custom screen that prioritizes boost information. And also chassis voltage because we had an alternator issue as well.
I'm going to set this up for continuous read-out. I should have been able to do that on this last trip, but it turns out that the 3M CR window tint is incompatible with even the best quality cell phone suction mounts. I had asked the installer if suction cups would damage the tint. He said, "Absolutely not." The part of that information which was NOT included in his statement was that it won't damage the tint for the simple reason that it cannot stick to the tint (I can't believe I drove yet another six thousand miles with my phone in my lap). So now I have to engineer a new dash mount so my phone can become a continuous read-out of this information (as well as disclosing codes if something goes wrong).
These readings below are near max because the screenshot was taken as we were climbing a rather large mountain.