◉ Top Paid Educational Apps in US, UK, AUS, GER,...
◉ Rated 9/10
◉ Users Reviewed: "Top Class Calculator !"

The BEST Alternative to Graphing TI-83, TI-84, TI-89, Casio FX, Sharp EL,...

Calculator Infinity (∞) – The sleek, multi-function calculator for iPhone/iPad is proud to offer a variety of features to satisfy all ranges of customers: The App possesses a powerful math core and algebra engine with mathematical display support, making it a viable tool for everyone from those looking for basic calculation to more advanced users, such as scientific computation, programmers, engineers, and math students. Calculator ∞ makes available everything you need – including a user manual and tutorial video clips – so you can master the app in a matter of minutes!

◉ Official Website:

▸ Universal Calculator App
▸ Support All the Latest Devices ¹
▸ Support Multitasking (iPad)
▸ Support Wireless KB²
▸ Mathematical Display
▸ Edit & Export Expression/Result
▸ History Tape View
▸ Basic Calculations (+, -, x, ÷, %, Abs,...)
▸ Advanced Functions (Sin,Cos,Ln,X!, ^, √,…)
▸ 14 Memory Variables (Including X,Y,Z,M)
▸ Assignment Operator
▸ F(x) Customize Functions (F1, F2, F3)
▸ Unit Converter (21 Categories, 400+ Units)
▸ Over 40 Common Constants
▸ Fraction and Degree/Angle Calculation
▸ Numeric Integral & Derivative Calculation
▸ Dual Skins (Silver Light & Carbon+)
▸ No Ads

▸ Big Integer & Rational Number (Up to 500!)
▸ Expand and Factor Polynomials
▸ Indefinite integral & Derivative
▸ Two-side Limit
▸ Taylor Series Expansion
▸ Hints and Solutions

▸ Simultaneous Graph
▸ Smooth Zoom & Transformation
▸ Conic Equations (Parabola, Hyperbola, Ellipse)
▸ Get Intersections, Min, Max & Special Points

▸ Advanced Two-side Limit
▸ Advanced Indefinite Integral
▸ General Equations (Accurate Roots)

▸ General Equations (Numerical Roots)
▸ Quadratic & Cubic Equations
▸ System of Linear Equations (2 & 3 Unknowns)

▸ Modify & Sort Data
▸ Single Variable Statistics
▸ Linear, Quadratic, Power Regression
▸ Logarithmic & Exponential Regression

▸ Polar & Rectangular Notation
▸ Argument, Conjugate Function
▸ Trigonometry Functions
▸ Logarithmic & Exponential Functions

▸ Support Up to 7x7 Matrix
▸ Support Complex Numbers
▸ Cross, Dot Product
▸ Det, Inverse, Transpose
▸ Cramer’s Rule Solver
▸ Numerical Real Eigenvalues

▸ 15 Different Bases
▸ Support Up to 64 Bits Integer
▸ Binary Operation (NOT, OR, XOR, 2’S, …)

▸ English, Spanish, German,
▸ French, Japanese, Chinese

¹: Include iPhone 6/6S+ HD Retina Display
²: Standard English KB

Calculator ∞ is not only the Calculator

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Please contact us for questions, bugs/crash reports, conversion requirements, etc....

What's New

Version 4.8.3

▸ Algebra Module Update
▸ Stability Improvements
▸ Minor Bug Fixes.

Ratings and Reviews

4.7 out of 5

397 Ratings

397 Ratings

Easiest To Use, Beyond Full Featured


This calculator is probably much more than what most would use it for but it does have an immense amount of features. As for being the best, if are not that concerned with "the fancy looks" I would say calculator infinity does it all and makes everything really easy to understand. For someone that has to perform higher level functions I would recommend Calculator Infinity at home or st a job. They have a PDF on their website for it and if you get the bundle I think it was super cheap and get a unit converter along with it and it also has a PDF. These are just options because I do use and like 42 but not for everything. If are in school this will be a problem unless you have a really cool professor that will allow you to have your phone open in class, especially during a test. You basically build visible calculations into this, like on paper and it solves the problem but ultimately, it is cool and fast at home but most professors would never allow you to use a phone during a test, so if are trying to skirt around learning how to solve problems without resorting to a scientific calculator, this probably won’t be of much help in a college or high school class.

Great calculator

The emusifyer

I use this calculator for many advanced and all of my variable based calculations for one reason - this calculator allows you to input the equation in its original form. For students, that means they can input their equations in textbook format father than a long string of numbers and variables with excess parentheses so the program can sort it out.
A couple things I would like to see. Needs and updated manual. Also, still can’t find the infinity button needed for some calculations. Also, would like the ability to tell it which variable to solve for. Right now it automatically solves for x but there are times i have multiple variables and need specific ones.
Also, I would like to complement this developer for always upgrading the existing app instead of trying to get people to repurchase a newer version as other app developers have been trying. I feel confident this developer won’t let his existing customers down and that says a lot these days.

Great calculator, but ONE super annoying problem


It’s a great, feature filled scientific calculator, but they made the ridiculous decision to put the “options” button slightly overlapping the “0” button, resulting in accidentally opening the options frequently. It’s a bizarre decision, given that sliding the keyboard up a very small amount would solve the problem while only reducing the size of the output screen a negligible amount. Or they could have it overlap any button that isn’t used in approximately 1/10 of every equation I enter. Or just put it in the lower corner of the display area. I feel like they essentially places it in the worst possible location, and it makes me not want to use an otherwise great app.


An Truong
84.3 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Arabic, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish
Age Rating
Rated 4+
© 2018 Inception Mobile


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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