
IH Toolbox
35+ field tools, 25+ global OEL references, and — new in 2.5 — a full sample record from plan to lab result to exposure report.
Mobile instruments for industrial hygiene, occupational health, and safety professionals — built by a retired Navy industrial hygienist who got tired of carrying six cases to a scoping visit.
Screening only. Your device microphone is uncalibrated and unweighted — the same honesty IH Toolbox applies to every phone reading. Audio never leaves this page.
Each module is a full iOS app. Where an app runs a calculation, its page carries a working bench test using the same math as the app.

35+ field tools, 25+ global OEL references, and — new in 2.5 — a full sample record from plan to lab result to exposure report.

27 verified isotopes, 17+ calculators, laser and RF hazard zones, and a medical physics suite for RSOs and health physicists.

AI-drafted Job Hazard Analyses with pre- and post-control risk ratings, the hierarchy of controls in order, and on-site signatures.

Compare one chemical’s exposure limits across 30+ regulatory bodies in 22 countries, with carcinogen flags and offline access.

Scores a room’s light, color temperature, and noise against what you’re about to do — from deep focus to sleep.

How many minutes your dog’s paws can safely touch the pavement right now — plus smoke, heat, and the safest window to head out.
These apps aren’t built by developers who researched safety. They’re built by a safety professional who learned to write software — so the workflows match how the work is actually done.
Veteran and active-duty service members get discounted pricing, available in-app. Thank you for your service.