Support & Contact
How can we help?
Found a bug, a question that doesn't read right, or an explanation that's unclear? Let us know, and we usually reply within 24 to 48 hours.
Email support
Email is the fastest way to reach a human. Please include your device platform (iOS or Android) and, if relevant, which topic or question the issue is on.
support@teklabs.xyzFrequently asked questions
Is this the official CDL knowledge test?
No. The app is an independent study tool with original practice questions modeled on FMCSA's publicly documented CDL knowledge-test topic areas. It is not affiliated with or endorsed by the FMCSA or any state DMV.
Do I need an account?
No. There is no sign-in or cloud sync. Your progress and settings are stored on your device.
Why do I see ads?
The app is free, and ads help cover development and hosting costs. Ads appear when you finish a study session or a mock exam, and on some overview screens, never while you are answering a question. We use Google AdMob, which follows iOS App Tracking Transparency: you can change that permission any time in iOS Settings under Privacy & Security, Tracking.
I think a question or answer is wrong.
Email us with the question. We review it and ship corrections in the next update.
Does this cover my state's CDL test?
The app currently covers the federal core: General Knowledge and Air Brakes, the areas every state's knowledge test is built on. State-specific content is on the roadmap.