Version 2.2 Released

Version 2.2 is now up on Google Play.  This adds a new Number Format setting (under General).  This allows the user to choose the decimal mark, digit grouping, and function argument separator that they wish to use.  Previously the decimal mark was always a point and there was no digit grouping.  When digit grouping is turned on, digits are automatically grouped as you enter them (unless you have basic text entry enabled).  For example, if you set the digit grouping to a comma and enter "12345", it will automatically be grouped and display "12,345" in the entry.

Currently the calculator history only stores the last 20 calculations in the calculator history.  I have had requests for a way to permanently store calculations.  For the next update I am planning on adding a way to permanently store calculations.  I have some ideas on how I would like to add this feature and I think it will end up being pretty neat once I get it in.  This feature will only be available in the paid version.  Once I get some of it implemented I will post some screenshots with more information on how it will work.

Matrix update published.

Version 2.1 has been published on Google Play.  This add the new matrix operations ref, rref, lu, qr, cof, eigval, and eigvec to the paid version.

Matrices

The next update will add more matrix functionality to the paid version.  I am working on adding the following.

• Row echelon form.
• Reduced row echelon form.
• LU decomposition
• QR decomposition
• Eigenvalues and eigenvectors
• Cofactor matrix.

Eigenvalues and eigenvectors will only be calculated in decimal mode but the rest will work in both decimal and integer modes.  In addition, there will be a new setting to view the steps for matrix some matrix operations.  For example, when enabled, you will be able to view the steps used to transform a matrix into row reduced echelon form.

There isn't enough space on the default keyboard to add all of these new operations.  Therefore, there will be a new "more" key on the default keyboard.  The more key can be added to your custom keyboards too.  When you press the more key, a new screen will be brought up that will list all keys that are not on your keyboard.  On the default keyboard, pressing the more key will list these new matrix operations (since they won't be on the default keyboard).

UI Changes Released

Google Play has now been updated with the new UI changes.  Some changes include a wrap text and full screen option.  You can also hold down the arrow keys to repeatedly moved the cursor on the calculator.  In addition, there are many other small changes that should make the calculator easier to use.

UI Changes

The current user interface (UI) isn't nearly as attractive as I would like it to be.  I'm not much of a designer, but I have been working hard the last week to try to make the UI more attractive and more user friendly.  

In the next update, the calculator will mostly function the same as before.  However, there are some layout changes.  For consistency, all versions of android will now have an action bar (the navigation bar at the top of the screen).  I am considering making it optional for devices with a menu button.  Here is a screenshot of the new UI I have created.  Things are set in stone yet, so there could be some changes before the actual update.

The default keyboard color scheme is shown above.  With this, only the digit and the four basic operator keys are colored  (digits are white and operators are blue).  Everything else is a dark gray.  However, users will have the options to change to three other color schemes: light, medium, and dark.  In these three schemes, similar keys will be colored the same.  Here are three screenshots showing light, medium, and dark.

Light:

Medium:

Dark:

In the paid version users will be able to set any key to any choice of color they want when creating their custom keyboards.

There will also be some changes to the graph screen.  Currently when graphing you have to hit an up arrow to open up a tabbed view to view reading, bounds, and equations.  The up arrow will be going away in the new UI.  Instead, there will be a drop down selection in the action bar to select which tab you want to view (and a None selection to view the graph full screen).  In the image below, you can see that "Readings" is selected in the action bar so the readings tab is shown.

Finally, when graphing in landscape the screen will be split vertically instead of the current horizontal split.  This should make it must easier to use graphing in landscape.

Thanks for the nominations!

Thanks to everyone who nominated MathAlly Graphing Calculator for best education app on bestappever.com.  We were one of the top ten nominated apps in the education category.  Voting for the final round has now closed.

Version 1.16

Version 1.16 is now on Google Play.  This adds the ability to set variable domains and graph conic sections in the form Ax^2+Bxy+Cy^2+Dx+Ey+F=0.  There are also numerous other smaller changes and additions.  You can see more changes on our version history page.