Out of 250+ scientific calculator apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
Compare top Scientific Calculator Apps (August 2026)
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.
This app offers a modern graphing calculator experience on your iPhone. It features fast, interactive touch-screen graphing, scrollable windows, and intelligent error messages for a more intuitive user experience. Designed to be a usable alternative to physical graphing calculators.
What We Love
👍 Identical to TI-84 calculator
🚀 Seamless and intuitive user experience
💰 Affordable alternative to physical calculator
📱 Convenient to have on phone
Room to Improve
🐛 Occasional bugs and crashes
🔍 Missing some advanced features like regression types
This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.
What are the best scientific calculator apps for iPhone?
Scientific Calculator fx-991 tops our scientific calculator apps ranking as of August 2026, with a 4.5-star average from 381 App Store ratings, and it's free to download.
Are there free scientific calculator apps for iPhone?
Yes — 20 of the top scientific calculator apps we rank are free to download, including Scientific Calculator fx-991 and Calculate84.
Does Scientific Calculator fx-991 have ads or in-app purchases?
Scientific Calculator fx-991 shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
How many scientific calculator apps are on the App Store?
We track 250+ scientific calculator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
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.