Prepfield CDL
Prepfield CDL is a phone app with original practice questions for the commercial driver's license (CDL) knowledge tests.
Legal and help pages
- Privacy Policy
- Terms of Use (End User License Agreement)
- Subscription, Billing and Refund Terms
- Data Deletion
- Support and Contact
- Disclaimer and Trademarks
This app is an independent study aid. It is not affiliated with, or endorsed by, any state licensing agency, the Federal Motor Carrier Safety Administration or AAMVA. Rules vary by state: always check your state's CDL manual.
Contact: hello@prepfield.app. Effective October 11, 2026.