EduCalc Classic Pro9.3 - App Store

** I recommend buying EduCalc Pro instead of this app. That said, I will be maintaining this app. **

Features:

1) Scientific Calculator. A lot of thought has gone into the design of the keyboard, which gives you everything you need while keeping the keys as large as possible. Available functions include the following:

. the usual arithmetic functions and exponentiation.
. square root, cube root, nth root, natural log, log base 10, log of arbitrary base, absolute value, factorial, permutations (nPr), combinations (nCr), modulus, random integer, bell curve, cumulative normal distribution.
. Define and name your own constants
. Summations
. Complex numbers!
. Sig figs (requires iOS 6; enable under settings)
. Programmable keys (enable under settings)

2) Graphing. Capabilities:
. Graph up to nine equations at once.
. Graphs are labeled.
. You can drag the graph or pinch to zoom in or out.
. Calculator can find roots and intersections.
. Can graph in polar coordinates.
. Can graph parametric equations.
. Can graph parametric equations.
. Can graph implicit functions, such as x^2+y^2-4=0. Most calculator apps can't do this!

3) Vector and Matrix calculator. Vector dot and cross products. Multiply and add matrices. Determinant, transpose, Eigenvalues and Eigenvectors.

4) It can make a table of the values of any function you care to enter. You can choose the starting x value of the table, as well as how much x increases for each successive row.

5) Triangle solver. Enter three sides, two sides and an angle, or two angles and a side, and the solver calculates the rest.

6) Polynomial solvers. Find roots of linear, quadratic, or cubic polynomials.

7) The reference hits the high points of the following subjects:
algebra, calculus, geometry, trigonometry, vectors, vector calculus, and classical mechanics. So if you need a reminder of a trig identity . . . or the quadratic formula . . . or the chain rule from calculus . . . and so on, it's right there for you.

8) A unit converter. Your data are in meters, and you need an answer in feet? No problem! With a tap, you can enter the result of your conversion into the calculator. Currently converts different units of the following: acceleration, angle, area, density, distance, energy, force, mass, power, pressure, speed, temperature, time, and volume. Great for physics problem sets! You can also define your own units.

9) Constants for scientific calculations -- speed of light, strength of gravity at Earth's surface, etc. etc. etc. Tapping on a constant will insert it into your calculation -- i.e, you don't have to key in the value. Again, great for physics problem sets!

10) Statistics mode, including options for scatter plots and for regression lines.

11) Works on both iPhone and iPad.

*** Note about the screenshots -- if you are viewing this in iTunes, you can see 10 different shots across the 2 different devices. They are all different shots. We need that many to show the range of capabilities of the calculator; even still we are leaving some things out. ***

I'd love to learn about your comments or suggestions. You can write me at jockuxyzsch@gmail.com -- but without the xyz. Thanks!

Version History updated for iOS 14
fixes for unit converter in dark mode
new website 9.3 10/28/2020 updated for iOS 13. 9.0 07/13/2020 fix iOS 8 layout issues 8.4 01/09/2018 minor fixes 8.3 01/07/2018 darker icon
info on Mac version under more, but not on calculator 8.2 09/15/2016 Info on SGC 2.
Age the icon a little
Also, Mac version is out! 8.1 08/18/2016 Info about Scientific Graphing Calculator 2 -- check the more tab. Also, the price is right! 7.9 02/03/2016 LimitDomain and LimitRange functions 7.8 01/15/2016 cosmetic improvements 7.7 11/06/2015 Fixed weighted coin flip functions
fixed key appearance in unit converter 7.6 05/13/2015 fixed iOS8.3 crash bug 7.5 04/12/2015 bug fixes
mention existence of mathinbrief.com 7.4 02/11/2015 64-bit support. If you have a 64-bit device, and all of your apps have 64-bit support, performance will improve.
Cleaned up days between dates appearance on iPad.
If you find any problems, PLEASE write me at the address in the app. 7.3 12/29/2014 Switch to turn equations on and off 7.2 11/16/2014 Fixed bug with graphing log function in iOS 8. 7.1.1 10/30/2014 iPad landscape should work correctly now. Please let me know if you still have problems.
Removed the option to lock iPad rotation. You can do this via iOS. 7.1 10/10/2014 Fixed landscape on iPad
iPhone 6 and iPhone 6 plus support 7.0 10/04/2014 New icon!
Error corrections
Changes to maintain compatibility with iOS 8 6.12 09/18/2014 Fixed Transform the Cat
Exponential Regression 6.11 04/15/2014 Remove debugging code from real app 6.10 04/02/2014 Removed debugging code that accidentally escaped into the main version under certain circumstances 6.9 03/20/2014 Can hide individual units via settings
Unit converter icons improved in iPad retina
fixed grains in units (again) 6.8 02/28/2014 Performance improvements
Convert currencies under units 6.6 02/04/2014 Improved behavior when resizing scatter plots
Improved behavior when setting regression
fixed bug with tangent(90 degrees) and similar
other bugfixes 6.5 12/17/2013 Fit polynomial to data under stats
graphical improvements
convert degrees to/from degrees+mins+secs under trig 6.4 11/27/2013