Official CDL Test Prep: Iowa

The official CDL test preparation app, created in partnership with AAMVA and the Iowa DOT, provides everything needed to pass the Iowa Commercial Driver's License exam on the first try. It includes over 600 exam-like questions and lifetime access to the complete CDL manual. The app covers all stages of a CDL professional's career, from pre-licensing to hazardous materials and school bus driving.

The free version offers limited access to the manual and a small number of sample questions. To unlock full access, users can upgrade to the premium version through a one-time in-app purchase. The premium version includes 600+ practice questions with detailed explanations and images, all 13 chapters of the manual, 40 essential definitions, and dozens of test-taking strategies.

The app offers two auto-renewing subscription options: one month for $4.99 and 12 months for $19.99. Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the end of the current period. Payments are charged via Google Play, and prices may vary by country.