The Cram Fighter free account allows all of the same functionalities as the paid account. However, the free account will only allow you to see a week of your schedule, starting from the first day of Study Block with the earliest start date you create.
For example, if you sign up for a free trial in January, but want to create a study block that starts February 1st, you would tasks from February 1st through 7th. If you built one study block starting February 1st and one study block starting February 2nd, you would see only see tasks from February 1st through 7th.
After 7 days, you will not see a further study schedule until you subscribe.