PI83 Graphing Calculator

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Update is out! See below for new features in this update.

Our next update is already in the works, and includes these features:

* Implicit multiplication.
- An alternative "big button" interface for our users with larger fingers.
- More minor improvements to replicate the functionality of the TI83.
- More responsive interface.
- Caching of common functions and calculations for improved speed.

PigLit is committed to regular updates until you NEVER need to pull out your TI83 again. Let us know what else youd like to see, and stay tuned for new features in later updates!
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Weve had a lot of people claiming that they cannot get the Graph feature to work. Remember that the powerful math engine of the PI83 requires you to specify multiplication explicity. For example, you must type:

y = 3 * x NOT y = 3x
y = 4 * sin(x) NOT y = 4sin(x)
y = 5 * x^2 NOT y = 5x^2

If youre still having trouble graphing, please contact us directly (email: support@piglit.net or via DM on Twitter @piglit) and we will walk you through the process. We GUARANTEE the PI83 can graph anything you throw at it!
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PI83 is on sale at 80% off for a limited time!

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The PI83 Graphing Calculator is an iPhone app designed to replace the Texas Instruments TI83 graphing calculator. With over 100 math functions, it makes expensive and bulky graphing calculators a thing of the past.

* Statistics
+++ Combinatorics (nPr, nCr, and factorial)
+++ Linear, exponential, logarithmic, polynomial, power, and sine regressions
+++ Mean, Standard Deviation, Variance, Q1 and Q3

* Matrices and Vectors
+++ Dot Product and Cross Product
+++ Determinants and Inverses
+++ Trace and Dimension

* Trigonometry
+++ sin, cos, tan, cosec, sec, cot
+++ Hyperbolic Trig Functions
+++ Inverse Trig Functions

* Complex Numbers
+++ Modulus and Argument
+++ Conjugates
+++ Exponential and cis Notation

* Algebra
+++ GCD and LCM
+++ Scientific Notation with 20 digit precision
+++ Convert between rectangular and polar.

The graphing functions are intuitive, powerful, and easy to use. Features include:

* Touch screen panning and zooming
- Multi-colored graphs
- Rectangular, polar, complex, and parametric coordinates
- Zero, Min, and Max
- Intersections
- Trace and Table
- Screenshots

The PI83 also timestamps all screenshots to facilitate use in classrooms and for test-taking. Teachers can see both the time that the app was opened and the time the screenshot was taken in order to ensure that the student did not exit the app to look up answers.

Throw away your TI83 today! We guarantee you will not find a graphing calculator as complete as this.