Help Center

Download the app from the App Store or Google Play, open it, and choose your trade. That's it — you're ready to ask Rex your first question.

On first launch the app asks for your trade so Rex tailors its answers and code references to your work. You can change it any time in Settings.

Point your phone at the job, ask your question out loud or by photo, and Rex returns the code-backed answer in plain language — with the note to verify adoption with your AHJ.

Start with 10 free questions. Put Rex on your next ten questions and see the difference on the job — no card required to get moving.

Solo, Pro, and Team. Each can be billed monthly or annually (annual locks the lower rate for the year). See the Plans page for what's included.

Your plan renews automatically at the end of each billing period. You can change or cancel any time from inside the app; access continues until the end of the period you've paid for.

Yes — your plan and what's included are the same whichever device you download on, and you manage it right from the app.

Rex helps you diagnose the job, gives you the right code reference in plain language with a citation, and generates professional reports and quotes.

Rex informs your judgment — it does not replace you, your licence, or your decision. It's a co-pilot, not the boss. The call on the job is always yours.

Codes are adopted and amended locally. Rex always reminds you to verify adoption with your Authority Having Jurisdiction (AHJ), because local amendments can apply to your specific job.

On a real hazard — gas, CO, a fall risk, a live circuit — Rex stops you and flags it before anything else. It's there to have your back on the job.