Koydo CDL Prep
Practice Tests & Study Guide
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Practice for the CDL knowledge exam with one focused app for the sections that matter on test day.
Koydo CDL Prep helps future commercial drivers study the FMCSA and state DMV knowledge areas with state onboarding, section practice, mock exams, starred review, recently-wrong review, Progress Points, reminders, and parked-study voice prompts.
WHAT'S INSIDE
• 1,250 sourced state-rules prompts across all 50 states
• 1,577 total English CDL practice rows across core sections, pre-trip, and state rules
• Section-by-section practice for General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Doubles/Triples, Tanker, Passenger, School Bus, and Pre-Trip Inspection
• 8-question placement to recommend the best starting section
• Full mock exam with 80% pass threshold and readiness certificate
• Starred and recently-wrong review modes
• Progress Points, streaks, levels, and standalone opt-in CDL leaderboard
• Parked-study mode with optional speech input, for parked breaks only
• Clean CDL-specific account, subscription, and legal flow in the app
IMPORTANT
Koydo is an independent adult study app. It is not affiliated with FMCSA, any DMV, or any state licensing authority. Always confirm requirements against your official state CDL manual.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://koydo.app/privacy
Support: https://koydo.app/support
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Reliability improvements for subscriptions and purchases, plus performance and stability fixes for a smoother study experience.
Good luck on your CDL exam!
The developer, Robert Waltos, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KOYDO LLC
- Size
- 175.3 MB
- Category
- Education
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Koydo CDL 6-Month $24.99
- Koydo CDL Monthly $14.99
- Koydo CDL Annual $34.99
- Copyright
- © 2026 Koydo