X, Y axis cannot be scaled independently
Visually attractive and kind of fun to use. However, the graphing feature does not support independent scaling of the X and Y axis, so usefulness is limited.
Update (3 years later): to add to the irritation, there are fields to configure the axis scales, but the Y-axis scale is, of course, ignored.
Aspiring Tuna about
Solve - Graphing Calculator, v5.1.2