Scientific Calculator fx-991

Scientific Calculator fx-991

Step-by-step Math Solver

344 ratings
61 reviews
Free
In-App PurchasesWith Ads

Price history


Details

  • Released
  • Updated
  • February 28, 2023
  • May 23, 2026

Features

Scientific Calculator fx-991 screenshot #1 for iPhone
Scientific Calculator fx-991 screenshot #2 for iPhone
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Scientific Calculator fx-991 screenshot #4 for iPhone
Scientific Calculator fx-991 screenshot #5 for iPhone
Scientific Calculator fx-991 screenshot #6 for iPhone
Scientific Calculator fx-991 screenshot #7 for iPhone
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About

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.

Step-by-step equation solver
Advanced scientific functions
Graphing mode
Formula library
Unit converter
Casio fx-991 inspired interface
Show original description

What's New in Scientific Calculator fx

1.8.8

May 23, 2026

Optimize speed and detailed results when solving quadratic equations, fractional equations, and rational equations.

Subscription plans

Monthly Premium Access

Full access to premium features for one month

$1.991 Month
How to cancel Scientific Calculator fx subscription ⁉️
2

In-App Purchases

$0.99

Remove Ads 30 Days

Remove ads for 30 days.

User reviews

공학용계산 잘 됨

복소수 계산 주로 사용중

Response from developer

별 5개 평점을 주셔서 정말 감사합니다! 🌟 여러분의 응원은 저희가 앱을 계속 개발하고 개선하는 데 큰 동기가 됩니다. HiEdu와 함께 즐거운 시간을 보내시길 바랍니다! 🚀

Good app

Very very very helpful exactly like my physical Casio and so helpful

Response from developer

Amazing! Thank you for the 5-star review! 💖 We are so happy to know that you are satisfied with the app. If you have any suggestions to make it even better, feel free to share! 😊

너무 좋네요

완벽합니다

Response from developer

별 5개 평점을 주셔서 정말 감사합니다! 🌟 여러분의 응원은 저희가 앱을 계속 개발하고 개선하는 데 큰 동기가 됩니다. HiEdu와 함께 즐거운 시간을 보내시길 바랍니다! 🚀

정말 좋은 계산기

카시오 fx-fx570es plus & fx-570cw 두종류를 사용하고 있어 비슷한 디자인과 기능이라 정말 편리합니다.

Response from developer

정말 멋집니다! 별 5개 리뷰 감사합니다! 💖 앱에 만족하셨다니 정말 기쁩니다. 더 나은 앱을 만들기 위한 의견이 있으시면 언제든지 알려주세요! 😊

🫶

🥰

Response from developer

Thank you so much for your 5-star rating! 🌟 Your support is a great motivation for us to continue developing and improving the app. We wish you a fantastic experience with HiEdu! 🚀

Developer apps

FAQ

What does the Scientific Calculator fx-991 app do?

This app functions as a powerful scientific calculator designed to help users solve math and science problems. It offers step-by-step solutions for equations, advanced mathematical functions, interactive graphing, an extensive formula library, and a unit converter.

What are the key features of this calculator app?

Key features include a step-by-step equation solver, advanced scientific functions for algebra and calculus, a graphing mode to visualize functions, a comprehensive formula library for math, physics, and chemistry, and a unit converter. It also boasts an interface inspired by the Casio fx-991.

Is this app free to use?

The app is available for free download and use, but it does contain in-app purchases and advertisements. Users may choose to purchase additional features or remove ads through these in-app options.

Who would benefit from using this app?

This app is ideal for high school and college students studying math, physics, and chemistry, as well as engineers and professionals in STEM fields. Its comprehensive features and step-by-step solutions make complex calculations and learning more accessible.

What kind of math problems can this calculator solve?

The calculator can handle a wide range of math problems, including algebra, fractions, trigonometry, derivatives, and integrals. It provides detailed step-by-step solutions to help users understand the problem-solving process.