Operator Toolbox

HeiveMind

About this app

Operator Toolbox puts 94 field calculators in your pocket — built for water/wastewater operators, electricians, and plant techs who need fast, reliable math on the job, no signal required.
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▎ Categories:
▎ • Chemical dosing and feed calculations
▎ • Water and wastewater treatment formulas
▎ • Pump hydraulics and horsepower
▎ • Electrical calculations (Ohm's law, motor loads, and more)
▎ • Unit conversions for the field
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▎ Features:
▎ • Works fully offline — no internet needed
▎ • Save favorites for quick access to the calculators you use most
▎ • Logbook to track your calculations over time, with CSV/PDF export for reports and recordkeeping
▎ • Clean, distraction-free interface built for use in the field
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▎ Upgrade to Pro to unlock the full calculator library and remove limits.

What’s new

Operator Toolbox 3.0 — our biggest update yet!

• 180 calculators, organized into easy-to-scan sections
• NEW Power Plant: real steam tables, boilers, turbines, cooling towers & condensers
• NEW Wastewater section + more electrical tools
• Exam practice with worked solutions
• Rounds & Tasks with reminders
• Readings trends, shift handoff PDF & asset tagger
• One search box finds everything
• Member card, sunlight & glove modes, backup/restore