Best Engineering Calculator Apps

250+ iOS apps curated and reviewed

4.4 avg rating
18 free apps
Updated September 2026

Finding the right engineering calculator apps can be overwhelming with so many options. We've analyzed 250+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Engineering Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Scientific Calculator fx-991Scientific Calculator fx-991Free4.5ā˜… (404)YesYesSep 2026
2Construction Master Pro CalcConstruction Master Pro CalcFree4.8ā˜… (40K)NoYesSep 2026
3Calculate84Calculate84Free4.8ā˜… (53K)YesYesSep 2026
4Panecal Scientific CalculatorPanecal Scientific CalculatorFree4.8ā˜… (1.9K)YesNoSep 2026
5Calculator #Calculator #Free4.6ā˜… (36K)YesYesSep 2026
6Feet and Inches CalculatorFeet and Inches CalculatorFree4.6ā˜… (409)YesYesSep 2026
7Engineering CalculatorEngineering Calculator$1.991.0ā˜… (1)NoNoAug 2026
8Mechanical FormulaMechanical FormulaFree4.7ā˜… (34)NoYesSep 2026

Top Picks for Engineering Calculator

Scientific Calculator fx-991#1

Scientific Calculator fx-991 by Dinh Phuc

Step-by-step Math Solver
Editor's Choice
šŸ“š Education
4.5😊(404 ratings)
FreeAdsIn-App Purchases
Scientific Calculator fx-991 screenshot 1
Scientific Calculator fx-991 screenshot 2
Scientific Calculator fx-991 screenshot 3
Scientific Calculator fx-991 screenshot 4
Scientific Calculator fx-991 screenshot 5
Scientific Calculator fx-991 screenshot 6

This app provides a powerful scientific calculator with step-by-step solutions for equations, advanced functions, and graphing capabilities. It includes a formula library and unit converter, inspired by a popular Casio model, to aid in learning and problem-solving for math and science subjects.

What We Love

  • šŸ‘ Very helpful for classes
  • šŸ’° Free to use
  • šŸ‘ Useful without physical calculator
  • šŸ‘ Good for engineering students
  • šŸ‘ Handles imaginary numbers
  • šŸ‘ Super easy to use
  • šŸš€ Fast and easy to use
  • šŸ‘ Very helpful
  • šŸ‘ Exactly like physical calculator
  • šŸ‘ Faster than normal calculator
  • šŸ‘ Accurate and easy to use
  • šŸ‘ Replaced physical calculator
  • šŸ‘ Useful for school
  • šŸ‘ Good for revision
  • šŸ‘ Similar to Casio
  • šŸ‘ Convenient interface
  • šŸ‘ Aesthetic and good for math
  • šŸ‘ User interface is great
  • šŸ‘ Genuine with many functions
  • šŸ‘ Helpful for exams
  • šŸ‘ Precise calculations
  • šŸ‘ Complete and easy

Room to Improve

  • šŸ› Latest update inconvenient
  • šŸ› Update overrides calculations
  • šŸ› Mistake in challenge section
  • šŸ› Removed important buttons
  • šŸ› Cannot find pi button
  • šŸ› Simplified interface
  • šŸ› Duplicate log key
  • šŸ› Cannot change keyboard layout
  • šŸ› No 3-dot menu
  • šŸ› Can't upgrade to paid version
  • šŸ› App crashes on loading screen
  • šŸ› App closes on opening
  • šŸ› New layout missing CW
  • šŸ› 'i' key not working after update
Construction Master Pro Calc#2

Construction Master Pro Calc by Calculated Industries

Feet Inch Fraction Calculator
Strong Contender
šŸ”§ Utilities
4.8😐(40K ratings)
FreeIn-App Purchases
#52in Utilities
Construction Master Pro Calc screenshot 1
Construction Master Pro Calc screenshot 2
Construction Master Pro Calc screenshot 3
Construction Master Pro Calc screenshot 4
Construction Master Pro Calc screenshot 5
Construction Master Pro Calc screenshot 6

This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.

What We Love

  • šŸš€ Convenient and always available
  • āš™ļø Comprehensive construction calculations
  • šŸ’Ŗ Industry-standard tool
  • šŸ” Accurate and reliable
  • šŸ“± Integrates well with mobile devices

Room to Improve

  • šŸ’° Subscription model too expensive
  • šŸ”’ Locks data behind subscription
  • šŸ”„ Forced to re-purchase after device changes
  • šŸ” Lacks full metric support
  • šŸ”§ Occasional UI/UX issues
Calculate84#3

Calculate84 by Century Light LLC

Intended for use with TI-84
Worth Considering
šŸ“š Education
4.8😊(53K ratings)
FreeAdsIn-App Purchases
#61in Education
Calculate84 screenshot 1
Calculate84 screenshot 2
Calculate84 screenshot 3
Calculate84 screenshot 4

This app offers a modern graphing calculator experience on your iPhone. It features fast, interactive touch-screen graphing, scrollable windows, and intelligent error messages for a more intuitive user experience. Designed to be a usable alternative to physical graphing calculators.

What We Love

  • šŸ‘ Identical to TI-84 calculator
  • šŸš€ Seamless and intuitive user experience
  • šŸ’° Affordable alternative to physical calculator
  • šŸ“± Convenient to have on phone
  • šŸ” Comprehensive functionality matching physical calculator
  • šŸ¤ Honest and responsive developers
  • šŸŽØ Beautiful and polished user interface

Room to Improve

  • šŸ› Occasional bugs and crashes
  • šŸ” Missing some advanced features like regression types
  • šŸ”’ Previous purchases removed without warning
  • šŸ’° Subscription model can be expensive
  • šŸ“ŗ Intrusive ads in free version

More Engineering Calculator apps to explore

FAQ about Engineering Calculator

What are the best engineering calculator apps for iPhone?
Scientific Calculator fx-991 tops our engineering calculator apps ranking as of September 2026, with a 4.5-star average from 404 App Store ratings, and it's free to download.
Yes — 18 of the top engineering calculator apps we rank are free to download, including Scientific Calculator fx-991 and Construction Master Pro Calc.
Scientific Calculator fx-991 shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ engineering calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app functions as a powerful scientific calculator designed to help users solve math and science problems. It offers step-by-step solutions for equations, advanced mathematical functions, interactive graphing, an extensive formula library, and a unit converter.
Key features include a step-by-step equation solver, advanced scientific functions for algebra and calculus, a graphing mode to visualize functions, a comprehensive formula library for math, physics, and chemistry, and a unit converter. It also boasts an interface inspired by the Casio fx-991.

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