I decided to buy a Wifi OBD2 for my Q40 (which is pretty much the same as the EX)

The Wifi dongle is better than a bluetooth OBD2 dongle if you plan to use an iPhone for monitoring.

Here is the link.

https://www.amazon.com/gp/aw/d/B075FQH8 ... _pop_mb_pd

IOS App to use are either Dashcommand or Torque each cost about $10.

I bought the Dashcommand and it’s amazing that it does sync with the actual speed and RPM with no noticeable delay at all.

I did configure some gauges too since my car is ECUTEK tuned. Here are some pics of my guages on my iPhone 7.







You can add more guages as many as you like.

I forgot to mention this can also read and clear engine trouble codes etc....