As a student, I've found the TI-Nspire CAS software to work pretty well with units, but of course it's not free. https://education.ti.com/en/us/products/comput

As a student, I've found the TI-Nspire CAS software to work pretty well with units, but of course it's not free. https://education.ti.com/en/us/products/computer_software/ti-nspire-software/ti-nspire-student-software/tabs/overview https://education.ti.com/en/us/products/computer_software/ti...