Am I allowed to compare schools?
You are certainly able to compare schools by changing the cost of attendance, deleting state aid if you will be an out-of-state student, or modifying the amount of aid available from the school, among others.
Will FAFSA4caster help me understand my options?
Yes, it is a helpful tool for each person who is not yet ready to fill out a FAFSA form and really is intended for juniors or even younger so parents can start saving up for funding.