Graphing Calculator 84: Calc84

Tran Duy · checked 13 Nov 2026

#3 · Graphing Calculator Apps

Visit calc84-efd3d.firebaseapp.com ↗ Alternatives Graphing Calculator 84: Calc84 vs Desmos Graphing Calculator

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Graphing Calculator Apps6.0#3 of 8

Calc84 is a graphing calculator app for iPhone and iPad.

Pricing

MonthlyFree
YearlyFree
LifetimeFree
Monthly PremiumRenews every month · Premium features; cancel anytime$1.99/mo
Yearly PremiumRenews every year · Premium features; cancel anytime$2.99/yr
Lifetime PremiumPay once · Premium features$5.99 one-time

As calc84-efd3d.firebaseapp.com lists them, checked 23 Oct 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: calc84-efd3d.firebaseapp.com
Price: Free tier · from $2.99/yr
Free trial: Not stated
Core capabilities: It combines a graphing calculator with a computer algebra system, equation solver and statistics.
Device requirements: The website lists iPhone and iPad support and requires iOS 15 or later.
Equation solving: Auto Solver returns exact symbolic roots for polynomials through degree five and systems with up to five variables.
Graphing: It supports function, polar and parametric graphs, interactive tracing, intersections, roots and extrema.
Maker: The website identifies Duy Tran as the maker.
Math OCR: Math OCR recognizes handwritten or printed math from the camera or photos and converts it into editable expressions.
Output formats: Results can be displayed as decimals, fractions, mixed fractions, repeating decimals, DMS, polar form, prime factors, divisors or Roman numerals.
Premium limits: Premium is required for advanced math functions, statistics, inferential statistics and distributions.
Pricing model: The app is free to download, with monthly, yearly and lifetime Premium purchase options.
Privacy disclosure: Apple lists identifiers as data that may be used to track users across apps and websites owned by other companies; it says the disclosures are developer-provided and unverified by Apple.
Statistics: It offers one- and two-variable statistics, seven regression models, hypothesis tests, confidence intervals and distributions.
Support: The product website gives an email address for support.

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