569 verified questions built from official ESCO study materials — the EPA-approved organization behind the real exam. Full bank free with a free account (sample questions need no signup). AI Tutor, Weak Spot Drill, full explanations. Everything serious HVAC techs need.
🔒 One-time payment · Lifetime access · No subscription
Free tier has no credit card, no time limit. Pro unlocks everything — once.
🔒 One-time payment · Lifetime access · Processed securely by Polar
By purchasing you agree to our Terms of Service, Refund Policy and Privacy Policy
Price increases when next feature ships — no warning, no countdown.
Every feature below is locked in at your $14.99 founding price. When we ship, the price goes up — you pay nothing extra.
Built from official ESCO study materials, reviewed by certified HVAC technicians. Full bank free with a free account.
Ask any 608 concept — type or hands-free voice. Plain trade language, instant answers.
Visual readiness map across all 4 sections — see exactly where to drill next.
Listen to concept breakdowns in podcast format — study hands-free on the job.
Set your exam date — we build a day-by-day plan around your weak spots.
Printable sheets per section — pressure tables, recovery limits, legal thresholds.
Practice without internet — job sites, basements, anywhere signal is weak.
AI prediction of your real exam score based on your performance patterns.
🔒 One-time payment · Lifetime access · No subscription
Yes — $14.99 once, access forever. No monthly fees, no renewal, no "annual plan." Pay once and you're done.
We don't announce it in advance. When we ship major features, the founding price closes automatically. There's no countdown — it just changes.
No catch. $14.99 is the founding price — we're building the audience now while the platform is early. As we ship podcast audio, study planners, and offline mode, the price will reflect that. Early supporters lock in at today's price.
Most EPA 608 study books cost $19–$30 — and they don't tell you which topics you're failing. Pro gives you AI-driven drilling on your specific weak spots, plus a question bank from the same source organizations that produce the real exam.
No — free practice tests and 10 AI Tutor questions per month require zero sign-up. Your results stay local on your device.
Yes — fully responsive. Practice between jobs on your phone, at home on a tablet, or before the exam on desktop.
One payment. Every tool we build. No subscription, no renewal, no expiry.
Get Pro Access — $14.99 →