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Pay once. Pass the exam.

One-time unlock. No subscription. No recurring charges. You get everything that's in here today, and everything we ship from now on.

Free
$0
What you already get
  • ✓5 categories of practice quizzes
  • ✓Full timed practice exam (50q, 90 min)
  • ✓Personalized study plan
  • ✓Weak-areas tracking
  • —Ask Criss
  • —Photo-input on questions you're stuck on
  • —Future Pro features
Keep using it. No card needed.
Pro · Lifetime
Most popular
$49
one-time
All features. Forever. No subscription.
  • ✓Everything in Free
  • ✓Ask Criss — Socratic study coach, 24/7, on call
  • ✓Photo input — snap any code book page or diagram
  • ✓Personalized to your weak areas — Criss knows what you keep missing
  • ✓Code citations — IFGC, IMC, ASHRAE 62.1 section numbers
  • ✓Conversation memory — pick up tomorrow where you left off
  • ✓All future Pro features included
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Secured by Stripe. Pay once and you're in. 7-day refund if it doesn't help you study — just email crossmechanical22@gmail.com.
Why lifetime instead of a subscription?

Most techs study for 60-90 days, pass the exam, and don't need a study app anymore. Charging you $20/month would be a bad deal. One-time means you own it.