Study apps built for the trades.
Anvil Labs makes offline-first practice apps for US certification exams. Every question is written from the current federal source material, every answer is explained, and everything works without a signal — because the people using these apps are studying in a cab, a yard, or a mechanical room, not at a desk.
Our apps
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Commercial driving & refrigerant handling
TradeCert — CDL & EPA 608 Prep
Thousands of practice questions across CDL General Knowledge, Air Brakes, Combination Vehicles, Hazmat, Tanker, Doubles & Triples, Passenger, School Bus and Pre-Trip Inspection, plus EPA Section 608 Core and Types I, II and III. Timed mock exams, instant explanations, and full offline access.
Coming soon to Google Play
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In development
More trade certifications
The same study engine is being extended to further licensing exams. If there is a certification you would like covered, tell us and it goes on the list.
In development
How we build
Questions are written against current federal sources — the FMCSA CDL manual, 49 CFR for hazardous materials, and 40 CFR Part 82 for refrigerant handling. They are original practice items, not reproductions of any official exam. Numeric thresholds are checked against the regulation text rather than reproduced from memory, and the banks are reviewed and expanded on an ongoing basis.
Contact
Support and business enquiries: support@anvillabs.app