I've gotten Genius Math Tool, just to have something to do math with when I'm not online to be able to use Desmos or a physical calculator. I haven't seen many people talking about it, but I've enjoyed using it, albeit mostly just for messing around making graphs. In order, we got:

1. Golden Spiral
   
2. Cardioid

3. Weird disspating graph thingie (honestly I just wanted to make something not basic.)
   IIRC the EQ is: z = (e^-|x|)*cos(e^|x|)+ (e^-|y|)*cos(e^|y|)

4. Non-graph: Newton's method for sqrt(2) (just the results, although they show the code!)

Expect a comparison btwn other software if I decide to check others out.

I didn't show it here, but you can get the 3d graphs to auto-spin. It's very satisfying! :D