I would like an app for geometry. What I want to include:

Area of all regular shapes

Volume of all regular objects, as well as irregular objects. (Simply base area*height for irreg)

Surface area of all regular objects, including irregular pyramids

Program where you input two points and it gives: slope, distance, midpoint, y-intercept, x intercept, slope-intercept form, general(regular)form, and point-slope form

The quadratic formula

Triangle solver (like ZATTRI)

A diagram of the unit circle that shows the main points and angles, able to be zoomed in, allow for input of tracing to a certain angle or point

Sin, cos, tan, sec, csc, and cot converter

I would also like an app to convert:

Degrees to radians and back

All forms of pressure

Lengths

Masses

Volumes

Metric prefixes