The ACT and SAT are the two main standardized admissions tests typically used in the college application process. Testing policies vary from college to college, and some institutions are test-optional. It is best to review the testing policies for each of the colleges to which you plan to apply before submitting your final application. Depending on personal preference, college applicants typically take either the ACT or SAT; colleges will accept either. It costs money to take admission tests, but fee waivers are available to eligible students.