Free to study. Pay only to simulate.
Every practice question, explanation and study guide is free forever — no signup needed. A one-time unlock adds the exam-day simulation and premium tools on the exams that have them.
Free — forever
$0
- ✓All practice questions with full explanations
- ✓Study guides for every topic
- ✓Practice by topic, unlimited
- ✓Wrong-answer log
- ✓In English, 中文, Español, Tiếng Việt
Exam unlock
$59one-time · lifetime · per exam
- 🔒Full-length, timed mock exam
- 🔒Unlimited retakes + full answer review
- 🔒Weak-area analytics & score report
- 🔒Chinese video explanations — coming soon (视频讲解)
- 🔒Everything in Free stays free
Which exams are paid? Most exams are fully free. The one-time unlock currently applies to the California CSLB contractor exams (Business & Law, General Building B, Electrical C-10, Plumbing C-36) — our deepest Chinese-language exams (video explanations coming soon). Every exam's practice questions and study guide stay free.