Best Scientific Calculator Plus 991 Apps

249+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated October 2026

If you already know Scientific Calculator Plus 991, this is the deeper bench. 249+ scientific calculator plus 991 apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of October 2026.

Compare top Scientific Calculator Plus 991 Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Scientific Calculator Plus 991Scientific Calculator Plus 991Free4.7โ˜… (13K)YesYesNov 2026
2Scientific Calculator fx-991Scientific Calculator fx-991Free4.6โ˜… (448)YesYesNov 2026
3Scientific Calculator 991CWScientific Calculator 991CWFreeโ€”NoYesOct 2026
4Scientific Calculator fx-991EXScientific Calculator fx-991EXFree3.1โ˜… (7)NoYesOct 2026
5Scientific Calculator 991EXScientific Calculator 991EXFreeโ€”NoYesOct 2026
6Panecal Scientific CalculatorPanecal Scientific CalculatorFree4.8โ˜… (2K)YesNoNov 2026
7Calculator with History TapeCalculator with History TapeFree4.7โ˜… (3.2K)NoYesNov 2026
8HiPER Scientific CalculatorHiPER Scientific CalculatorFree4.7โ˜… (275)YesYesOct 2026

Top Picks for Scientific Calculator Plus 991

Scientific Calculator Plus 991#1

Scientific Calculator Plus 991 by Tran Duy

NCalc & CalcES Calculator 115
Editor's Choice
๐Ÿ“š Education
4.7๐Ÿ˜Š(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

  • ๐Ÿ‘ Intuitive and easy to use
  • ๐Ÿš€ Powerful and feature-rich
  • ๐Ÿ’ก Customizable interface and settings
  • ๐Ÿ” Extensive library of formulas and equations
  • โš™๏ธ Handles complex math and scientific functions well
  • ๐Ÿง  Helpful for STEM students and professionals

Room to Improve

  • ๐Ÿ› Occasional bugs and input issues
  • ๐Ÿ”€ Confusing layout and button placement
  • ๐Ÿ’ฐ Some advanced features locked behind paywall
Scientific Calculator fx-991#2

Scientific Calculator fx-991 by Dinh Phuc

Step-by-step Math Solver
Strong Contender
๐Ÿ“š Education
4.6๐Ÿ˜Š(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

  • ๐Ÿ‘ Very helpful for classes
  • ๐Ÿ’ฐ Free to use
  • ๐Ÿ‘ Useful without physical calculator
  • ๐Ÿ‘ Good for engineering students
  • ๐Ÿ‘ Handles imaginary numbers
  • ๐Ÿ‘ Super easy to use
  • ๐Ÿš€ Fast and easy to use
  • ๐Ÿ‘ Very helpful
  • ๐Ÿ‘ Exactly like physical calculator
  • ๐Ÿ‘ Faster than normal calculator
  • ๐Ÿ‘ Accurate and easy to use
  • ๐Ÿ‘ Replaced physical calculator
  • ๐Ÿ‘ Useful for school
  • ๐Ÿ‘ Good for revision
  • ๐Ÿ‘ Similar to Casio
  • ๐Ÿ‘ Convenient interface
  • ๐Ÿ‘ Aesthetic and good for math
  • ๐Ÿ‘ User interface is great
  • ๐Ÿ‘ Genuine with many functions
  • ๐Ÿ‘ Helpful for exams
  • ๐Ÿ‘ Precise calculations
  • ๐Ÿ‘ Complete and easy

Room to Improve

  • ๐Ÿ› Latest update inconvenient
  • ๐Ÿ› Update overrides calculations
  • ๐Ÿ› Mistake in challenge section
  • ๐Ÿ› Removed important buttons
  • ๐Ÿ› Cannot find pi button
  • ๐Ÿ› Simplified interface
  • ๐Ÿ› Duplicate log key
  • ๐Ÿ› Cannot change keyboard layout
  • ๐Ÿ› No 3-dot menu
  • ๐Ÿ› Can't upgrade to paid version
  • ๐Ÿ› App crashes on loading screen
  • ๐Ÿ› App closes on opening
  • ๐Ÿ› New layout missing CW
  • ๐Ÿ› 'i' key not working after update

More Scientific Calculator Plus 991 apps to explore

FAQ about Scientific Calculator Plus 991

What are the best scientific calculator plus 991 apps for iPhone?
Scientific Calculator Plus 991 tops our scientific calculator plus 991 apps ranking as of October 2026, with a 4.7-star average from 13K App Store ratings, and it's free to download.
Yes โ€” 20 of the top scientific calculator plus 991 apps we rank are free to download, including Scientific Calculator Plus 991 and Scientific Calculator fx-991.
Scientific Calculator Plus 991 shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 249+ scientific calculator plus 991 apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.