Best Fx 580 Apps

42+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated October 2026

Finding the right fx 580 apps can be overwhelming with so many options. We've analyzed 42+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Fx 580 Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Scientific Calculator Plus 991Scientific Calculator Plus 991Free4.7★ (12K)YesYesOct 2026
2Scientific Calculator fx-991Scientific Calculator fx-991Free4.6★ (415)YesYesOct 2026
3ClassWiz Calc App QRClassWiz Calc App QRFree2.1★ (8)YesYesOct 2026
4HiPER Scientific CalculatorHiPER Scientific CalculatorFree4.7★ (268)YesYesOct 2026
5CalculatorCalculatorFree3.0★ (9.8K)NoNoOct 2026
6FX CalculatorsFX CalculatorsFree4.8★ (1.3K)YesYesOct 2026
7Panecal Scientific CalculatorPanecal Scientific CalculatorFree4.8★ (1.9K)YesNoOct 2026
8Desmos Scientific CalculatorDesmos Scientific CalculatorFree4.3★ (332)NoNoSep 2026

Top Picks for Fx 580

Scientific Calculator Plus 991#1

Scientific Calculator Plus 991 by Tran Duy

NCalc & CalcES Calculator 115
Editor's Choice
📚 Education
4.7😊(12K 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

  • 👍 Intuitive and easy to use
  • 🚀 Powerful and feature-rich
  • 💡 Customizable interface and settings
  • 🔍 Extensive library of formulas and equations
  • ⚙️ Handles complex math and scientific functions well
  • 🧠 Helpful for STEM students and professionals

Room to Improve

  • 🐛 Occasional bugs and input issues
  • 🔀 Confusing layout and button placement
  • 💰 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
📚 Education
4.6😊(415 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

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

Room to Improve

  • 🐛 Latest update inconvenient
  • 🐛 Update overrides calculations
  • 🐛 Mistake in challenge section
  • 🐛 Removed important buttons
  • 🐛 Cannot find pi button
  • 🐛 Simplified interface
  • 🐛 Duplicate log key
  • 🐛 Cannot change keyboard layout
  • 🐛 No 3-dot menu
  • 🐛 Can't upgrade to paid version
  • 🐛 App crashes on loading screen
  • 🐛 App closes on opening
  • 🐛 New layout missing CW
  • 🐛 'i' key not working after update
2.1(8 ratings)
FreeAdsIn-App Purchases
ClassWiz Calc App QR screenshot 1
ClassWiz Calc App QR screenshot 2
ClassWiz Calc App QR screenshot 3
ClassWiz Calc App QR screenshot 4
ClassWiz Calc App QR screenshot 5
ClassWiz Calc App QR screenshot 6

This app brings the functionality of Casio's ClassWiz scientific calculators to your smartphone or tablet. Perform advanced calculations, manage spreadsheets, and generate graphs by connecting to Casio's online services. It mirrors the operation of physical calculators and uses QR codes for seamless integration.

More Fx 580 apps to explore

FAQ about Fx 580

What are the best fx 580 apps for iPhone?
Scientific Calculator Plus 991 tops our fx 580 apps ranking as of October 2026, with a 4.7-star average from 12K App Store ratings, and it's free to download.
Yes — 20 of the top fx 580 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 42+ fx 580 apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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