Pricing for Kami


I’m new to using Kami as a student at my school, and I’m a bit confused relating to the pricing. On the Drive App Store it says that there is a “14-day evaluation period where you can try Kami.” Does this mean that I will not be able to use Kami for free after two weeks, or does it just mean that features will be limited? I have found Kami to be very useful, but unfortunately I am not in a place where I can pay for that kind of thing. How exactly does the pricing work?