How can I post screenshots of works on this forum if they are paid. I have no way to buy the Pro version. I use the Program purely for educational purposes and do not make money with it. There is no way to pay $ 240 per year
You can simply make regular iOS screenshots for free just like in any other app.
Understood, thanks 
If you are using Shapr3D as a student, you can get Pro for free: https://support.shapr3d.com/hc/en-us/articles/115001796629-Is-there-an-educational-license-How-do-I-apply-