Best Scientific Calculator Fx-991 Apps

250+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated November 2026

Every iPhone needs a few good scientific calculator fx-991 apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Scientific Calculator Fx-991 Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Scientific Calculator fx-991Scientific Calculator fx-991Free4.6β˜… (448)YesYesNov 2026
2Scientific Calculator 991EXScientific Calculator 991EXFreeβ€”NoYesOct 2026
3Scientific Calculator Plus 991Scientific Calculator Plus 991Free4.7β˜… (13K)YesYesNov 2026
4Scientific Calculator fx-991EXScientific Calculator fx-991EXFree3.1β˜… (7)NoYesOct 2026
5Scientific Calculator 991CWScientific Calculator 991CWFreeβ€”NoYesOct 2026
6CalculatorΒ²CalculatorΒ²Freeβ€”NoYesMay 2026
7School CalculatorSchool Calculator$1.99β€”β€”NoOct 2026
8Calculator: Calculate AnythingCalculator: Calculate AnythingFreeβ€”YesNoAug 2026

Top Picks for Scientific Calculator Fx-991

Scientific Calculator fx-991#1

Scientific Calculator fx-991 by Dinh Phuc

Step-by-step Math Solver
Editor's Choice
πŸ“š Education
4.6😊(448 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

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

Room to Improve

  • πŸ› Latest update inconvenient
  • πŸ› Update overrides calculations
  • πŸ› Mistake in challenge section
  • πŸ› Removed important buttons
  • πŸ› Cannot find pi button
  • πŸ› Simplified interface
  • πŸ› Duplicate log key
  • πŸ› Cannot change keyboard layout
  • πŸ› No 3-dot menu
  • πŸ› Can't upgrade to paid version
  • πŸ› App crashes on loading screen
  • πŸ› App closes on opening
  • πŸ› New layout missing CW
  • πŸ› 'i' key not working after update
Scientific Calculator Plus 991#3

Scientific Calculator Plus 991 by Tran Duy

NCalc & CalcES Calculator 115
Worth Considering
πŸ“š Education
4.7😊(13K ratings)
FreeAdsIn-App Purchases
Scientific Calculator Plus 991 screenshot 1
Scientific Calculator Plus 991 screenshot 2
Scientific Calculator Plus 991 screenshot 3
Scientific Calculator Plus 991 screenshot 4
Scientific Calculator Plus 991 screenshot 5
Scientific Calculator Plus 991 screenshot 6

This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.

What We Love

  • πŸ‘ Intuitive and easy to use
  • πŸš€ Powerful and feature-rich
  • πŸ’‘ Customizable interface and settings
  • πŸ” Extensive library of formulas and equations
  • βš™οΈ Handles complex math and scientific functions well
  • 🧠 Helpful for STEM students and professionals

Room to Improve

  • πŸ› Occasional bugs and input issues
  • πŸ”€ Confusing layout and button placement
  • πŸ’° Some advanced features locked behind paywall

More Scientific Calculator Fx-991 apps to explore

FAQ about Scientific Calculator Fx-991

What are the best scientific calculator fx-991 apps for iPhone?
Scientific Calculator fx-991 tops our scientific calculator fx-991 apps ranking as of November 2026, with a 4.6-star average from 448 App Store ratings, and it's free to download.
Yes β€” 19 of the top scientific calculator fx-991 apps we rank are free to download, including Scientific Calculator fx-991 and Scientific Calculator 991EX.
Scientific Calculator fx-991 shows ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 250+ scientific calculator fx-991 apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.