I took the test 2 times for the air breaks and failed. This app has helped me to pass...the questions are spot on. If you are struggling to actually use the app, just get help from the creator. Great app...worth the download if you are serious about your CDL. Take them over and over again.

I bought this app and I can't even take the practice test for the Cdl. I don't recommend anyone to buy this app.

This question set does not represent the questions I just experienced February 2015. I want some of my money back!

Passed my CDL A written exam at DDS with flying colors with help from this application. Definitely recommend buying this app for studying on the go.