Supported Features
-
VoiceOver
-
Voice Control
-
Larger Text
-
Dark Interface
-
Differentiate Without Color Alone
-
Reduced Motion
IH/OH Toolbox: Pro Instruments
CIH Prep, OEL & Safety Tools
Free · In‑App Purchases · Designed for iPad
Professional field screening and measurement tools for industrial hygiene professionals. Comprehensive suite designed by certified experts for occupational health safety.
The most comprehensive industrial hygiene and occupational health app ever built. 35+ professional tools — instruments, calculators, references, and certification exam prep — designed by a CIH/CSP with 25+ years of field experience. Everything you need for workplace safety, right on your iPhone or iPad.
MEASUREMENT INSTRUMENTS
Turn your device into a field-ready toolkit. Sound Level Meter captures real-time noise with A-weighting and TWA tracking. Light Meter uses your rear camera for calibrated lux and foot-candle readings. Anemometer estimates air velocity via microphone or Bluetooth. Vibration Meter assesses hand-arm and whole-body exposure. WBGT Heat Stress integrates live weather data with work/rest calculations. UV Toolkit estimates ultraviolet exposure and risk. Cold Stress calculates wind chill and frostbite thresholds. Noise Contour visualizes sound exposure mapping across work areas. Pressure Differential supports negative pressure verification for containment rooms.
PROFESSIONAL CALCULATORS
IH Equation Solver puts dozens of essential industrial hygiene formulas at your fingertips. Chemical Mixture OEL Calculator determines additive effects using TLV mixture formulas. Air Sampling Planner designs monitoring strategies with proper durations and flow rates. Ventilation Rate Calculator computes required exhaust and dilution airflow. NIOSH Lifting Equation calculates recommended weight limits for manual handling tasks. Fall Clearance Calculator determines minimum distances for fall arrest systems. Ergonomic Screening performs RULA and REBA assessments. Spill Volume Estimator models chemical release quantities for emergency response. Cartridge Life estimates respirator changeout schedules. Confined Space monitors oxygen, LEL, and toxic gas levels. Hazard Assessment screens and prioritizes workplace health risks. Ladder Selector determines proper height and type. Full scientific calculator and unit converter included.
REFERENCE LIBRARY
Access critical safety data offline. OEL Selector searches occupational exposure limits across 10+ jurisdictions — OSHA PELs, NIOSH RELs, Cal/OSHA PELs, plus standards from the UK, Australia, New Zealand, Canada, Singapore, and South Korea. Respiratory Protection Guide covers respirator selection and assigned protection factors. Chemical Storage Categorizer checks compatibility and segregation requirements. Fire Extinguisher Guide matches types to fire classifications. Safety Sign Decoder identifies GHS, NFPA, and workplace symbols. Interactive Periodic Table for element reference. Customizable Safety Checklists support inspections with PDF export.
CIH & CSP EXAM PREPARATION
Prepare for the Certified Industrial Hygienist and Certified Safety Professional exams with timed practice questions and detailed explanations. Track progress, identify weak areas, and build confidence before exam day.
BUILT FOR THE FIELD
GPS-tagged measurements tie readings to specific locations. Export professional PDF and CSV reports for documentation and compliance. CloudKit sync across all Apple devices. Pin favorites for instant access. Calibration controls maintain measurement accuracy. Apple Pencil support and full iPad optimization with keyboard shortcuts. Lone Worker safety monitoring with check-ins and emergency SOS protects isolated personnel.
VETERAN-OWNED. PRIVACY-FIRST.
Built by Fouled Anchor Safety LLC, a veteran-owned small business. No ads. No tracking. No data harvesting. Your data stays on your devices and your iCloud — never on our servers.
Whether you're conducting exposure assessments, preparing for certification exams, responding to chemical incidents, or managing safety across multiple sites, IH/OH Toolbox replaces a bag of instruments and a shelf of references with one powerful app.
Download the toolkit safety professionals actually need.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.fouledanchorsafety.com/privacy/
- Octave band analyzer added to SLM
- Bugs and UI fixes
The developer, Fouled Anchor Safety LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Fouled Anchor Safety LLC
- Size
- 19.8 MB
- Category
- Business
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- CIH/CSP Test Prep $49.99
- Lifetime Access $999.99
- Military Yearly $103.99
- Monthly Pro $12.99
- Yearly Pro $129.99
- Copyright
- © 2026 Fouled Anchor Safety LLC