IHehsCalc vs IHNotes

This is a calculator for some of the equations found in the environment, health and safety (EHS) and industrial hygiene profession. There was originally an IHcalc app, aka IHcalc Lite. This was the product of some very smart students at Arizona State University. This is a new creation as an homage to that original app. This is version 1.0 of IHehsCALC, and I hope you will find it useful. The app is free, but we really, really, really, REALLY would like to see some folks make a donation to the American Industrial Hygiene Foundation. Also any corrections or suggestions please let us know via the help URL.

IHNotes is a mobile companion for industrial hygiene and occupational health professionals to plan, collect, and manage field samples efficiently. Designed for use in dynamic field environments, IHNotes simplifies sample tracking, equipment assignments, and exposure documentation while maintaining complete data integrity. Key Features: Field Sampling: Create and manage air, noise, and wipe samples directly from the field. Automatic Timekeeping: Record start/stop times for each sample with built-in timers and status tracking. Equipment Management: Assign, track, and verify calibration history for pumps and instruments. Site Integration: Capture location and contextual details for every sample. Role-Based Access: Secure, cloud-synced data for field, lab, and admin teams. IHNotes enables EHS teams to standardize sampling workflows, reduce manual errors, and ensure complete traceability from field collection to lab submission — all within one connected platform.