Hi Ronique. We are unique because we provide mobile apps that allow you to study anywhere, anytime. We present the content in an interactive format, and allow you to practice problems and review the explanations. If you are stuck, you may post your questions and a contributor or your peers will comment to help you. Our modules are inexpensive. This is a more convenient and high-tech alternative to books, and much more affordable than private tutoring. Our app can also be used as a supplement if you already attend an on-site test prep course.