EduCalc Classic9.3 - App Store

A powerful, flexible graphing calculator

Does far more than most calculators out there.

Features:

1) Scientific Calculator. Simple to grasp and easy to use, but powerful features are available when you need them. 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, decimal to fraction.

2) Graphing. Capabilities:

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

3) A unit converter. 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 doing physics homework!

4) 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 doing physics homework!

5) 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.

6) Help screens linked directly to many of the available functions and constants. Tap the disclosure arrow to see the definition.

7) Forgot the quadratic formula? Or the double-angle formulas for sine and cosine? The math/science reference hits the high points of various subjects. Currently includes algebra, differential and integral calculus, geometry, trigonometry, vectors, vector calculus, and classical mechanics.

8) Keep track of significant figures [AKA sig figs]

9) Statistics -- enter data and make a histogram, box and whisker plot, or scatter plot with optional regression line.

If you are viewing this in iTunes, you will see five iPhone screenshots and five iPad screenshots. But even ten shots don't come close to showing everything this calculator can do.

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

Version History Fix unit converter in dark mode 9.3 10/28/2020 new website 9.2 10/19/2020 ios 14 updates 9.1 10/04/2020 Fix bug with in-app purchase 9.0.1 10/19/2018 New name
Updated info about related apps
Updated description 9.0 10/12/2018 Darker icon
info on Mac version under more, but not on calculator
minor reference fixes 8.2 09/22/2016 Info on FGC 2. It's better than this app!
Age the icon a little
Also, Mac version is out! 8.1 08/18/2016 Let everyone know that FGC 2 is out 8.0 05/25/2016 Replace iAd with AdMob. I've used what they call "text" ads. The "text" part isn't really true, but it is the least intrusive kind available on AdMob. 7.10 03/23/2016 Info about Scientific Graphing Calculator 2 -- check the more tab > Full Version. Also, the price is right! 7.9 02/03/2016 LimitDomain and LimitRange functions 7.8 01/15/2016 cosmetic improvements 7.7 11/07/2015 added implicit functions and inequalities to free version
fixed some coin flip functions 7.6 05/13/2015 Fixed iOS8.3 crash bug 7.5 04/12/2015 Added some reference material that was formerly only in the paid version
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 Fixed crash when graphing log function under 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 iPhone 6 and iPhone 6 plus support
iPad landscape mode fixed 7.0 10/05/2014 Error corrections
Some iOS-8-compatibility related fixes
New icon! 6.12 09/18/2014 fix bug where debug code escaped into full app 6.10 04/02/2014 Removed debugging code that had accidentally escaped into the main version under certain circumstances 6.9 03/18/2014 Performance improvements
Converter icons at full resolution in iPad Retina 6.8 02/28/2014 bug fixes
polynomial regression in stats
convert degrees to/from degrees+minutes+seconds under trig 6.5 01/02/2014 bug fixes 6.2 11/11/2013