Apps Like Instrument Toolbox for iPhone and iPad
Ranked alternatives
Showing 541–560 of 1,000 ranked alternatives.



Calculator 1+1
Vikas Choudhary
Calculate, edit, and track equations
Perform basic arithmetic operations, including addition, subtraction, multiplication, and division. Use parentheses for complex calculations. Switch between light and dark themes for better visibility.

Fault Current Calculator (PFC)
Pro Certs Software Ltd
Calculate fault current for electricians instantly.
The app calculates prospective fault current, prospective short-circuit current, and prospective earth fault current. It supports single-phase and three-phase systems and works offline.




ASPE Tables V4
American Society of Plumbing Engineers
Access equations, pipe data, and design info
Access plumbing equations, pipe sizing data, and code references for system design. Include IPC and Uniform Plumbing Code standards. View background information and check balances. Set alerts and lock cards remotely.

Parker FittingFinder™
Parker Hannifin Corporation
Configure hydraulic fittings and adapters easily.
The app configures hydraulic fittings and adapters through a visual selection process. It provides part numbers, specifications, drawings, pressure ratings, and CAD models for standard and custom options.





Spill Calc - Pro
Kelly Gayneaux
Calculate volume across shapes and ground types
Calculate volume for liquids and saturated soils using input dimensions. Estimate in barrels and gallons. Break spills into sections for tracking. Add custom notes for each .

PCalc
TLA Systems Ltd.
Calculate, convert, and program with precision
Perform complex calculations with support for hexadecimal, octal, and binary. Use RPN mode and multi-line display. Access unit conversions, scientific constants, and engineering notation. Enable multiple undo and redo. View results on a paper tape.


Smart-Calculator Pro
晖明 甘
Calculate, record, and track equations
Perform calculations with basic and scientific functions including percentages, exponents, and trigonometric operations. View or hide calculation history. Use voice input in multiple languages. Access a calculator widget for quick access.



How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.