You can try Rationale here, without making an account.
This trial version is limited: you can make maps with 5 boxes, you cannot save, print, export or share maps and you can access only the first parts of the Tutorials.
Purchase a subscription
How can you buy a subscription?
First make a free account here.
Next, upgrade your free account to an account with a subscription here.
When you are a student/lecturer you can upgrade your free account with educational discount here, when you use the email address of our school, college or university.
If your institution is not on our discount list, send us your domain (possible after your email address is checked).
Do you have a code for Rationale?
When you received a code from your school, college or university, activate your license here after you made a free account first.