This thing is suppose to help with your memory. Basically it's supposed to organize your repetitions optimally so you don't have to repeat things unnecessarilly. I haven't tested it out long enough to know if it is very successful or not. Although, its premise seems logical enough. I downloaded the freebie study for latin but it requires the lastest version which you have to buy. They only let you download the older versions. There was a greek "mix" too, but that isn't free. Although there are other languages that are free. I'm playing with the French and German ones.