A. No, Materials Square is free!
Modelling, pre/post data processing, and many features are free for registered users. To perform simulations, you will need to credit your account to use MatSQ’s cloud servers for computation.
Basically, if your computations use the computing servers, you will be charged proportionally to the time used. For CALPHAD calculations, you will be charged according to the number of times you use the corresponding database.
Please refer to the link below for specific pricing policies.
https://www.materialssquare.com/pricing
Examples of costs for different jobs can be found at https://www.materialssquare.com/sample/list