Calculators that know the code.
One app per trade — a full box of field calculators plus an AI that answers the code and works the math. On your phone, offline, no account.
Free to download · works fully offline · no sign-up
One app per trade — a full box of field calculators plus an AI that answers the code and works the math. On your phone, offline, no account.
Each app is built around one trade's calculators and code — not a generic bundle. Electric is live now; the rest are on the way.
18 calculators — voltage drop, wire & conduit, motor FLA, PoE, fire alarm — plus NEC / NFPA 72 answers.
Download on the App Store
18 calculators — pipe & drain sizing, venting, gas pipe, water heaters, hydronics — plus IPC / UPC answers.
Download on the App StorePrecipitation rate, GPM & pipe sizing, run-time scheduling, backflow & zone design — plus code answers.
In developmentLoad & duct sizing, superheat / subcooling, static pressure, refrigerant charge — plus code answers.
In developmentMore trades on the way. A trade you want to see? Tell us.
Sizing, loads, fill, slope, flow, pressure — the real math, worked out with the answer rounded to a real-world size.
An AI that answers your code question in plain English, cites the exact section, and does the math — not just quotes the rule.
Every calculator runs on the phone. No signal in the crawlspace or the panel room? Doesn't matter.
Pin the tools you use most and save results to pull up later on the job.
Plain-language explainers written for the trade — the "why" behind the number.
Eight everyday calculators are free forever, with no account to create.
Ask it like you'd ask the sharpest hand on the crew. It gives you the concrete answer, shows the figures, and cites the section so you can verify.
8 everyday calculators · offline · no account
JourneyMan Pro — 7-day free trial