Code reader for dummies

[Sher715]

I’d like to get a code reader to use on my 2021 Silverado 6.6 diesel. I’m definitely no mechanic but I’d like something low priced that I can use to read any error codes to at least determine how serious they might be. 
 

I’ve looked online and there’s just a dizzying number of them at all price ranges. What seems to make sense to me are those that run off of an iOS app and an inexpensive Bluetooth dangle - but which one?

 

Any advice out there?

[rmsmis]

Personally, I have one that you can find on Amazon if you search for "BAFX Products Wireless WiFi (OBDII) OBD2 Scanner & Reader - for iOS / iPhone & Android Devices".  I use it with my iPhone and app called Car Scanner Pro (read more at www.carscanner.info).  The app is great, but the only thing I wish was different is that the scanner didn't create an open WIFI network when plugged in.  If you wanted to leave it in all the time I'd suggest something else that is a little more secure.