Best Scientific Calculator Plus 991 Apps

211+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated June 2026

If you already know Scientific Calculator fx, this is the deeper bench. 211+ scientific calculator plus 991 apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.

Top Picks for 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
4.5(344 ratings)
FreeAdsIn-App Purchases
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Enhance your math skills with the ultimate scientific calculator app designed for students and professionals. From step-by-step solutions to instant access to key formulas, HiEdu Calculator simplifies complex calculations and provides a vast library of functions. Perfect for standardized test preparation or everyday classwork - transform your educational journey today!

Scientific Calculator Plus 991#2

Scientific Calculator Plus 991 by Tran Duy

Designed for math calculator
Strong Contender
📚 Education
4.7😊(12K ratings)
FreeAdsIn-App Purchases
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A versatile scientific calculator app designed for math enthusiasts, offering features like natural display for textbook-like equations, symbolic and numeric modes, complex number calculations, calculus functions, statistical analysis, and unit conversion. With a premium upgrade option for additional advanced features and customization. Access the power of NCalc FX now!

What We Love

  • 👍 Intuitive and easy to use
  • 🚀 Powerful and feature-rich
  • 💡 Customizable interface and settings
  • 🔍 Extensive library of formulas and equations

Room to Improve

  • 🐛 Occasional bugs and input issues
  • 🔀 Confusing layout and button placement
  • 💰 Some advanced features locked behind paywall
HiPER Scientific Calculator#3

HiPER Scientific Calculator by Jindrich Houska

Worth Considering
🔧 Utilities
4.6(207 ratings)
FreeAdsIn-App Purchases
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An advanced scientific calculator with powerful features like symbolic algebra, equations, integrals, and derivatives. Supports up to 100-digit calculations, various layouts for different devices, and a wide range of functions including matrices, statistics, complex numbers, and more. Explore its capabilities and functions today!

More Scientific Calculator Plus 991 apps to explore

4
Calculate84
Calculate84
Calculate84
Intended for use with TI-84
Free

A modern graphing calculator application designed for iPhone users, offering fast and interactive touch-screen graphing with intuitive features and intelligent error messages. Created by individuals who found existing graphing calculator apps lacking, it is continually improved with feedback from students. Visit the app's website for Privacy Policy and Terms of Use.

📚 Education
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5
Calculator with History +
Calculator with History +
Calculator with History +
No ads & Scientific calculator
Free

A calculator app with a built-in history feature that keeps track of your calculations without any ads. Calculate effortlessly and access your past computations instantly.

💰 Finance
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6
Calculator₊
Calculator₊
Calculator₊
Basic, Scientific, Plus Calc
Free

Try Calculator₊, the ultimate mathematics tool offering basic, scientific, and plus calculations. Ideal for homework, exams, and managing expenses, this app is like having a personal math tutor on your phone. Download now for easy and intuitive math solutions!

🔧 Utilities
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7
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

Calculate complex mathematical equations effortlessly with this intuitive app. Simplify your calculations on the go with advanced features like graph plotting and equation solving. Download now to supercharge your math skills!

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8
Desmos Scientific Calculator
Desmos Scientific Calculator
Desmos Scientific Calculator
by Desmos, Inc.
Free

Explore a powerful scientific calculator with functions beyond basic arithmetic - trigonometry, statistics, and combinatorics. Create and evaluate custom functions, work offline, view multiple expressions at once, and enjoy a seamless user experience - all for free.

📚 Education
(327)
9
Calculator for iPad₊
Calculator for iPad₊
Calculator for iPad₊
Basic, Scientific, Plus Calc
Free

A powerful math solver and scientific calculator for iPad and iPhone, featuring advanced functions and quick calculations. Share your results easily and master your business expenses with percentage calculations. Get it now!

🔧 Utilities
(126K)
10
Graphing Calculator X84
Graphing Calculator X84
Graphing Calculator X84
Designed for use with Ti-84
Free

A powerful graphing calculator app designed for all users, offering both basic and advanced mathematical functions with a user-friendly interface. Equipped with a robust math core and support features for engineers and math students. Explore built-in documents and tutorials for a comprehensive mathematical experience.

📚 Education
(50K)
11
Calculator - Free Calculator
Calculator - Free Calculator
Calculator - Free Calculator
by 祥祎 刘
Free

Calculator - Free Calculator is a versatile and user-friendly app designed for iPad. Perform a wide range of calculations effortlessly with its optimized features. Download now to streamline your calculations on the go!

🔧 Utilities
(1.4K)
12
Calculator⁼
Calculator⁼
Calculator⁼
Fraction, Scientific Calc +
Free

A handy math assistant for solving basic and scientific calculations intuitively and quickly. Become a math master with this free app!

🔧 Utilities
(357K)
13
Panecal Scientific Calculator
Panecal Scientific Calculator
Panecal Scientific Calculator
For engineers and students
Free

A scientific calculator app designed for engineers and students, offering features like formula display, quick editing, memory functions, and various calculation modes. Improve accuracy and efficiency with easy formula navigation and editing tools. Explore advanced functions for different number systems and mathematical operations.

🔧 Utilities
(1.9K)
14
Graphing Calculator Plus AI
Graphing Calculator Plus AI
Graphing Calculator Plus AI
Scientific Graphing Calculator
$5.99

An advanced scientific graphing calculator app that is user-friendly and suitable for basic to advanced mathematics, offering a powerful math core and extensive support features. Ideal for engineers, math students, and more, with built-in documents for various calculations. Explore the world of advanced mathematics with ease and efficiency.

📚 Education
(12K)
15
Calculator HD Pro Lite
Calculator HD Pro Lite
Calculator HD Pro Lite
Basic & Scientific Calc
Free

A professional-grade calculator app designed for quick and accurate mathematical calculations on-the-go. Upgrade to the full version for advanced features and functionalities.

🔧 Utilities
(51K)
16
Calculator·
Calculator·
Calculator·
Big Basic Calculator
Free

A simple and intuitive calculator app with essential functions like addition, subtraction, multiplication, and more. Customize with multiple color schemes, copy results easily, and use additional functions on iPad. Experience the perfect balance of features and simplicity today!

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(33K)
17
Sci:Pro Calculator
Sci:Pro Calculator
Sci:Pro Calculator
by Jerry Montgomery
Free

A versatile calculator app with Basic, Scientific, and Programmer modes for iPhone, iPad, and iPod Touch. Easily view history and share results via email or copy. Get precise calculations on-the-go!

🔧 Utilities
(3.6K)
18
iCalc: Scientific Calculator
iCalc: Scientific Calculator
iCalc: Scientific Calculator
Smart Pro Calc with History
Free

This scientific calculator app offers advanced functions and features to help users calculate, practice, learn, and understand math, making it suitable for students and professionals of all levels. With its intuitive design, customizable options, and robust calculation history, users can conquer complex problems and explore various mathematical disciplines, and can get started with a subscription or lifetime in-app purchase.

📚 Education
(2)
19
Graphing Calculator Pro⁸⁴
Graphing Calculator Pro⁸⁴
Graphing Calculator Pro⁸⁴
Scientific Graphing Calculator
$12.99

Experience the ultimate scientific graphing calculator: analyze functions, solve equations, work with diverse mathematical elements seamlessly. Embrace efficiency and convenience in your calculations on-the-go - never be without a powerful tool at your fingertips.

📚 Education
(1.6K)
20
Calculator +
Calculator +
Calculator +
Scientific Calc Plus Fraction
Free

Experience the award-winning calculator app for iPad and iPhone, offering a free basic and scientific calculator with an elegant design, simple usability, and beautiful interface. Calculate with ease and precision today!

🔧 Utilities
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