CDL Prep is the best app for preparing for the Commercial Drivers License (CDL) test. The questions are from the actual test and cover all the categories. You can find questions for the 50 states in the US. You can choose the mode of the questions:

Modes:

You can use the app for the states you are preparing for the CDL test. These materials specifically cover the following tests:

Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming.