Best Scientific Calculator Plus 991 alternatives: apps like Scientific Calculator Plus 991

10+ similar apps compared and reviewed

4.2 avg rating
10 free apps
Updated November 2026

Scientific Calculator Plus 991 is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to Scientific Calculator Plus 991

Scientific Calculator fx-991#1

Scientific Calculator fx-991 by Dinh Phuc

Step-by-step Math Solver
Editor's Choice
📚 Education
4.6😊(451 ratings)
FreeAdsIn-App Purchases
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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
GeoGebra Calculator Suite#2

GeoGebra Calculator Suite by GeoGebra GmbH

Graph, construct, create
Strong Contender
📚 Education
4.3(61 ratings)
Free
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Explore mathematical concepts with a powerful suite of tools. Graph functions, solve equations, and construct geometric figures in 2D and 3D. Utilize augmented reality to visualize math in the real world and share your creations.

GeoGebra Graphing Calculator#3

GeoGebra Graphing Calculator by GeoGebra GmbH

Graph, Drag, Share
Worth Considering
📚 Education
4.3😐(284 ratings)
Free
GeoGebra Graphing Calculator screenshot 1
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This application allows users to easily graph functions and equations, identify key points, and share their work. It's a powerful tool for learning math and science, offering features like regression and access to learning activities.

What We Love

  • 📊 Powerful graphing and visualization capabilities
  • 💰 Completely free with no advertisements
  • 🎓 Excellent educational tool for mathematics students
  • ⚡ Fast and responsive for most functions
  • 🎨 Clean and intuitive user interface design
  • 📱 Works offline without internet connection
  • 🔧 Extensive mathematical functions and operations
  • 👍 Easy to use once familiar with basics

Room to Improve

  • 🐛 Frequent app crashes and unexpected closures
  • 💾 Cannot save work or projects persistently
  • 📱 Mobile version lacks features from desktop version
  • ⌨️ Difficult keyboard input for complex expressions
  • 🔄 Work lost when switching between apps
  • ⏱️ Performance lag with complex functions
  • 🖥️ Limited geometry construction tools on mobile
  • 🔐 No account login or cloud synchronization
  • ❌ Some mathematical commands not recognized
  • 🎯 Steep learning curve for new users

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This app offers a powerful scientific calculator with a wide range of functions for trigonometry, statistics, and combinatorics. Users can define and evaluate their own functions, assign values to variables, and view multiple expressions simultaneously. It works offline and is completely free to use.

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Desmos Graphing Calculator
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Graphing Calculator X84
Graphing Calculator X84
Graphing Calculator X84
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This app offers a free, powerful alternative to hardware graphing calculators. It supports basic to complex math, including graphing, statistics, and matrix operations, with a built-in user manual for assistance.

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