AI-driven practice tests with instant explanations based on IRC 2024. Master mechanical code inspection with personalized feedback.
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Get instant, personalized explanations for every question with direct IRC 2024 code references.
Identify weak areas and focus your study time where it matters most with AI-driven analytics.
Practice with timed, open-book exams that mirror the actual ICC M1 test format.
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Everything you need to know before you start
The M1 is the ICC certification exam for residential mechanical inspectors. Our question bank and explanations are grounded in the IRC 2024 (International Residential Code).
Yes. The real M1 is an open-book exam, and our Exam Mode mirrors that timed format so you can practice locating answers in the code under realistic conditions.
You get 10 free practice questions in Study Mode, each with a written explanation and the relevant IRC 2024 code reference, plus basic progress tracking. AI-powered explanations and the timed exam simulation are part of the paid plans.
On the paid plans you can request an AI tutor explanation for any question you've answered. Each explanation is grounded strictly in the IRC 2024 code reference for that question, so it stays exam-focused and accurate.
The 90-Day Pass is a one-time $39 payment for 90 days of full access. The Annual plan is $99/year for a full 365 days, and includes all new M1 content and any additional exams as they launch.
New accounts start with a 7-day trial that unlocks the full paid experience — no credit card required. When the trial ends, you can keep going on the free plan or upgrade any time.
No. ICC PrepAI runs entirely in your web browser on desktop, tablet, or phone — nothing to download or install.
Start free today — AI-powered explanations grounded in the IRC 2024.