Calculate84 icon

Calculate84: Graphing Calculator

by Century Light LLC

4.8
IOSEducation

Calculate84 is a fast, modern graphing calculator for iPhone, designed with an intuitive touch-screen interface. It offers scrollable windows and intelligent error messages, making complex calculations easier than ever.

About Calculate84

Calculate84 is a modern graphing calculator app designed specifically for the iPhone. Tired of clunky calculator apps? Calculate84 offers fast, interactive touch-screen graphing and an intuitive interface where everything is exactly where you expect it to be. Enjoy features like scrollable windows, eliminating the frustration of endless up-arrow key presses. The app also provides intelligent error messages to help you quickly identify and correct mistakes. We developed Calculate84 because we were unsatisfied with existing options. Before launching, we collaborated with students to continuously improve the app based on real-world usage. Calculate84 is a convenient and powerful tool for students and professionals alike. Experience the difference a well-designed graphing calculator can make. Ditch the old, frustrating apps and upgrade to Calculate84 for a seamless and efficient calculation experience. With its user-friendly design and robust functionality, Calculate84 is the perfect calculator for anyone needing advanced graphing capabilities on their iPhone. It's a must-have tool for math, science, and engineering.

Key Features

  • Experience fast, interactive touch-screen graphing
  • Utilize scrollable windows for easy navigation
  • Receive intelligent error messages for quick troubleshooting

Why Users Love It

Offers a fast, interactive graphing experience
Provides an intuitive and user-friendly interface
"“Great app for calculus and linear algebra. The interface is clean and easy to use, making complex calculations a breeze.”"

Perfect for: Perfect for students and professionals needing a powerful graphing calculator on their iPhone.

Screenshots

Calculate84 screenshot 1Calculate84 screenshot 2Calculate84 screenshot 3Calculate84 screenshot 4

📊Ranking History

Track Calculate84's performance in Education over the last 30 days

Top 5
Top 10
Top 15
Below 15

Current Rank

#39

Best Rank

#38

🏆

All-time high

Average Rank

#39

📈

30-day average

User Reviews

Error367091:UserNotFound
3/20/2025

I hate how expensive the TI calculators are (and the prospect of ewaste, as well as buying something my phone or laptop can do better, and supporting a single company monopoly), but also like to use something allowed on tests (so I can build skills for testing). This scales well on iPhone and iPad while still being fairly accurate to TI’s UI. (It does half screen, third of screen, full screen, slide over, etc super easily, so I can use it with procreate, Freeform, notion, etc smoothly). It’s also extremely convenient to not have to carry a giant old fashioned calculator with me. I think I prefer Desmos for a lot of tasks, but this helps for testing and has more specialized functions that would be done with Mathway or misc sites. The purchase model is also wonderful. I bought it years ago for highschool and can continue using it through college Must have for students I hate how expensive the TI calculators are (and the prospect of ewaste, as well as buying something my phone or laptop can do better, and supporting a single company monopoly), but also like to use something allowed on tests (so I can build skills for testing). This scales well on iPhone and iPad while still being fairly accurate to TI’s UI. (It does half screen, third of screen, full screen, slide over, etc super easily, so I can use it with procreate, Freeform, notion, etc smoothly). It’s also extremely convenient to not have to carry a giant old fashioned calculator with me.I think I prefer Desmos for a lot of tasks, but this helps for testing and has more specialized functions that would be done with Mathway or misc sites.The purchase model is also wonderful. I bought it years ago for highschool and can continue using it through college

Fayesway
6/27/2025

I absolutely love this calculator. You can actually do way more than the ones that you pay for. It’s so precise and sharp. Calculated 84 I absolutely love this calculator. You can actually do way more than the ones that you pay for. It’s so precise and sharp.

etjenkin
6/24/2025

There is every feature you could think of. My go to. lives on my first home screen. Responsive and comprehensive There is every feature you could think of. My go to. lives on my first home screen.

Useful great calculator!
4/1/2025

Very helpful when you don’t have a Ti84 calculator or if it is dead and you have to do homework Helpful and useful Very helpful when you don’t have a Ti84 calculator or if it is dead and you have to do homework

bryson reviews
3/30/2025

A free version of the 100 dollar calculators that literally works better. There’s no point in not having this app Literally the best A free version of the 100 dollar calculators that literally works better. There’s no point in not having this app

App Details

Developer

Century Light LLC

Platform

ios

Rating

4.8

Last Updated

8/27/2025