Bug Fixes and Engine Improvements

For the next update, I am working on fixing bugs and optimizing the engine.  Some more complicated problems are taking much longer to simplify than they should.  After the improvements I have made for the next update, some of these are now simplifying over 10 times faster than the current version.

I am also working on fixing some reported crashes when executing some problems or graphing some equations.

Custom Keys Released

Version 2.7 is now on Google Play.  This adds custom keys to the paid version.  I have also added a tutorial for custom keys on the website.  Click here to view tutorial.

Custom Keys Almost Here

Just through I would give a quick update since it has been a while since I posted about Custom Keys.  I am almost finished adding Custom Keys to the app.  If all goes well the custom keys update will be on Google Play next week.  I will also be adding a tutorial on the website on how to create custom keys.

Custom keys

Currently users must use M₁, M₂, M₃, or M₄ as memories for custom expressions and f, g, or h for custom functions.  Although this works, it is less than ideal.  Users can't name their expressions or functions something more meaningful and they are restricted to four expressions and three functions.

I am working on allowing users of the paid version to create custom keys for their custom expressions and functions.  You will be able to use letters in the English and Greek alphabet to name your custom expressions and functions.  You will also be able to create as many as you wish.

For example, someone my use the golden ratio a lot.  It is usually represented by the Greek letter  φ (phi) and is approximately equal to 1.6180339887.  With this new feature, you could create a custom key named φ and set that equal to 1.6180339887.  The key could be accessed by the "more" key or you could place the φ key on a custom keyboard to make it easier to access.

All Cartesian Graph Mode Released

A new update is now available in Google Play.  This adds the All Cartesian graph mode that I talked about in the last post.  It is only available in the paid version.  In the next few days I will also add a tutorial to the website to help explain the differences between the two Cartesian graph modes.

Cartesian Graphing

Currently, Cartesian graphing mode will only graph an equation if it is able to solve for x or y.  This works fairly well, since we are able to graph many different functions including conic sections.  However, things like sin(x)=cos(y) will not be drawn completely (since it will solve for y, and end up graphing y=arccos(sin(x))  ) and xy>0 will not be drawn at all.

 In the next update, the current Cartesian mode will be called "Fast Cartesian" and a new "All Cartesian" mode will be added.  Only the paid version will have the "All Cartesian" mode.  In this new mode, all equations will be graphed.  However, this mode will be slower at drawing equations (which is why the other mode will be called Fast Cartesian).  It will also not have as many readings available to view and you will not be able to view these equations in table format.  For these reasons the old Cartesian mode should be used unless the equation is not able to be drawn in the old mode.

Here are some examples of the new All Cartesian mode.

sin(x)=cos(y)

xy>0

Release 2.5

A new version is on Google Play.  This allows you to save graph setups and screenshots.  The copy, cut, paste, undo, and redo keys on the keyboard are now icons instead of text.  Last, the app has been translated to Spanish and Japanese.