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Inspired by the legendary TI-86.


Mathematical Constants: e, i, j, pi

Trig Functions: sin, cos, tan, arcsin, arccos, arctan

Hyperbolic Functions: sinh, cosh, tanh, arcsinh, arccosh, arctanh

Logarithmic Functions: log-10, log-2, log-e

Other Functions: square root, factorial, negate, inverse, absolute value, complex argument, erf, rand

Binary Operators: add, subtract, multiply, divide, exponent, modulo

Complex / imaginary numbers are fully supported!


Enter numbers in decimal, octal, or hexadecimal. Change the number base right after computing a result to convert the result to the new base. All numbers are treated as 32-bit (4-byte) unsigned integers.

Bitwise Operators: and, nand, or, nor, xor, xnor, shift left logical, shift right logical, rotate left, rotate right

Bitwise Functions: not (1's complement), 2's complement

Binary Operators: add, subtract, multiply, divide, modulo


Tap on the screen to position the cursor. Drag the screen vertically to scroll.

ALPHA-ALPHA: alpha lock (upper case)

2nd-ALPHA-ALPHA: alpha lock (lower case)

Use the "Entry" function to recall previous entries (up to 20). Use the "Ans" variable to get the previous result.

Use the "STO=>" function to store a value into a variable. Variable names can be a maximum of 5 upper- or lower-case letters.

Don't forget to look in the Settings app for more options (see screenshot).

What's New in Version 1.1

- Fixed bug with numbers to integer powers
- Louder click sound

iPhone Screenshots

Calc86 iPhone Screenshot 1

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Rated 5/5 based on 3 customer reviews.


5/5 stars

Handles like a TI-81-->86

Looks and feels the same for basic inputs. Does computer calculations but no user programmability. No graphing, but certain details of the user interface (like 2nd enter scrolls through history) are well done. Now I can see my calculations the way I want to see them and type them in the way I want to type them in. Great job!

5/5 stars


This is the best scientific calculator for iphone. Works great, fast, and has great multi-line display. Highly recommend it! I love it!

5/5 stars


I've always been a big fan of the TI-86, and it was a pure delight to find increadibly well made app. I used the 86 so much when I was in school that when I have to do a calculation now, I think in terms of how I would enter it in there, but I never have my 86 with me when I need it, so this fills the needs quite well. I just wish it had a couple functions that my real 86 had. But it's still really great.


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The information may be outdated (2011-03-27 16:26:53). For actual information go to iTunes

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