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

10+ similar apps compared and reviewed

4.1 avg rating
10 free apps
Updated November 2026

Looking for something like Scientific Calculator 991EX? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to Scientific Calculator 991EX

Scientific Calculator - Cal#1

Scientific Calculator - Cal by 长宏 侯

A Better Scientific Calculator
Editor's Choice
🔧 Utilities
5.0(5 ratings)
FreeAdsIn-App Purchases
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Scientific Calculator - Cal screenshot 6

Perform complex calculations with a natural input interface. This app offers instant results in both number and expression formats, supporting a wide range of mathematical functions. Enjoy a clean design with customizable options and offline availability.

4.7😊(275 ratings)
FreeAdsIn-App Purchases
HiPER Scientific Calculator screenshot 1
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This app offers advanced scientific calculation capabilities, including symbolic algebra, equation solving, and calculus functions. It supports high precision, natural expression input, and various display formats. Users can also visualize functions and equations with 2D and 3D graphing.

What We Love

  • 👍 Excellent functionality for technical users
  • 💡 Custom functions for non-trivial calculations
  • 👍 Great expression screen, easy to navigate
  • 👍 Accurate and intuitive UI
  • 👍 Remains the best after years of use
  • 👍 Excellent HP calculator emulation
  • 👍 Super complete and functional
  • 👍 Most advanced calculator available
  • 👍 Feels like a real scientific calculator
  • 👍 Very useful for exams
  • 👍 Best calculator on App Store and Google Play
  • 👍 Well-designed and robust

Room to Improve

  • 🐛 Keyboard unresponsive at times
  • 🐛 Ads in paid version
  • 🐛 iOS version lacks RPN mode
  • 🐛 iOS version lacks themes
  • 🐛 iOS version lacks custom functions
  • 🐛 iOS version lacks variables
  • 🐛 iPad version locked to landscape
  • 🐛 No custom fonts or skins on iPad
  • 🐛 Paid upgrade offers after purchase
  • 🐛 Expensive for some users
  • 🐛 iOS version has unreadable white text on dark background
  • 🐛 Android button feedback missing on iOS
  • 🐛 iOS buttons look more stripped back than Android
Panecal Scientific Calculator#3

Panecal Scientific Calculator by Noriyasu Kutsuzawa

For engineers and students
Worth Considering
🔧 Utilities
4.8😊(2K ratings)
FreeAds
Panecal Scientific Calculator screenshot 1
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This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

What We Love

  • 👍 Great button layout
  • 👍 Intuitive and user-friendly
  • 👍 Powerful scientific functions
  • 👍 Convenient display and history
  • 👍 Useful for various fields (construction, engineering, etc.)

Room to Improve

  • 🐛 Calculation errors in some cases
  • 🐛 Glitches and crashes reported
  • 🔍 Lack of engineering prefixes
  • 📺 Ads can be intrusive
  • 🔍 Suboptimal button placement and sizing

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