Frequently Asked Questions

Do you have a version for the iPhone, iPad, or iPod Touch?


What has changed with each version?

Visit for detailed release notes.

If you have problems registering the software:

Visit for detailed instructions.

The blue grid doesn't show up when printed or on overhead projection.

You can make the grid darker by graphing sin ax * sin ay = 0. Set a so that the solutions are the grid lines. In the default zoom, use a=2π. Darker2DGridLines.gcf demonstrates.

How can I label the x-axis in units of π?

You can label the x-axis by pasting pictures next to it. AxisInUnitsOfPi.gcf uses this feature to add labels at units of π.

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