Calculator ∞

◉ The best paid education app, popular in the US, UK, Australia, Germany...

◉ Rated 9 out of 10 on QAppReview.com

◉ User review: "一流的计算器！"
The best alternative to Graphing TI-83, TI-84, TI-89, Casio FX, Sharp EL, etc. calculators

Calculator Infinity (∞) – A simple and multi-functional calculator specifically launched for iPhone/iPad, now grandly introducing a variety of functions that can meet the needs of various users: Whether you are a basic calculation user or an advanced user, such as science calculation users, programmers, engineers, and mathematics majors, etc., this app is equipped with a powerful math core and algebraic engine, supports math demonstrations, and is an ideal tool for all users. Calculator ∞ provides everything you need, including a user manual and teaching video clips, and you can easily master the usage method in a few minutes!

◉ Official website: http://iPhoneCalculator.com

◉ Advanced features:

▸ Solve steps (hints)

▸ Math picture solver

▸ Handwriting recognition

▸ Function complete and comprehensive

◉ General features:

▸ Support all the latest devices ¹

▸ Support split-screen operation on iPad

▸ Support wireless keyboard ²

▸ Edit & export expressions/results

▸ History record viewing

▸ Basic arithmetic operations (+, -, x, ÷, %, Abs,...)

▸ Advanced functions (Sin, Cos, Ln, X!, ^, √, …)

▸ 30 memory variables (Including X, Y, Z, M)

▸ Assignment operations

▸ F(x) custom functions

▸ Unit converter (40 categories, 1000+ units)

▸ Up to 40 common constants

▸ Fraction and degree/angle calculation

▸ Numerical integration & derivative calculation

▸ Two-color skins (silver light & carbon black+)

▸ No annoying ads!!!

◉ Algebraic featured functions:

▸ Large integers & rational numbers (up to 500!)

▸ Expand & factor polynomials

▸ Indefinite integrals & derivatives

▸ Left and right limits

▸ Taylor series expansion

▸ Hints and solutions

◉ Two-dimensional charts:

▸ Plot graphs simultaneously

▸ Smooth zoom & transformation

▸ Support F(X, Y) = 0. Example: Si…