The safety professional's field notebook. Everything works offline — in a plant, in a tank farm, anywhere the signal doesn't reach.
Built by someone who did the job. A PhD scientist who spent a career as an EHS and quality director in chemical plants, tired of photographing findings on a phone and retyping them that night. Your records stay on your device. There is no account, and nothing is uploaded.
Photograph a finding, tag location and hazard, cite the standard, set the time to fix, and mark what happens next. Export the round as a report.
5 Whys, a fishbone that draws itself from your contributing factors, fault trees with AND/OR gates, and corrective actions tracked to closure.
Geometric mean and GSD from a lognormal fit, the 95th percentile, the 95%/95% upper tolerance limit, exceedance fraction, and a Six Sigma view with Ppu, DPMO and a control chart. Non-detects reported, not quietly dropped.
The full text of the General Industry and Construction standards, searchable with no signal, with the edition date on screen so you never quote stale regulation.
Look up a chemical by name or CAS number and the PEL fills itself in — Tables Z-1, Z-2, Z-3 and the construction limits, with skin and ceiling notations flagged.
8-hour TWA, mixture rule, Brief & Scala extended shifts, noise dose, ppm ↔ mg/m³, dilution ventilation, sample volume, WBGT. Each states its method and its limits.
Your subscription is confirmed from a receipt held on the device, so the app behaves the same underground as it does in the office. And if your subscription lapses, everything you recorded stays put and the export button keeps working — full PDF, full backup, no limits. These are your professional records. We will not hold them hostage.
$19.99 per month or $199.99 per year, with everything included from the first day. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your Apple ID Account Settings.
Regulatory text and exposure limits are drawn from the eCFR (public domain), with the edition date shown in the app. This is a documentation and calculation tool for qualified professionals — not a medical device, not a diagnosis, and not your employer's official record. Professional judgment governs every conclusion.