Built for the field
Calculators that know the code.
A full box of field calculators — plus an AI that answers the code and works the math for you. On your phone, offline, no account.
Free to download · works fully offline · no sign-up
A full box of field calculators — plus an AI that answers the code and works the math for you. On your phone, offline, no account.
Each app is built around one trade's calculators and code — not a generic bundle. More trades 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.
In App Store review — launching soonSizing, 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