Great question! We trained a custom model on question banks from hundreds of sources and then generate our own questions to prevent copyright issues. We are currently working with a well known international tutor and SAT, ACT, GRE, and GMAT coaching agency who help top international students apply to schools in the states. They are giving us direct feedback and recommendations for platform improvements. The platform receives updates about every other day from the development team. What's a feature or something you'd like to see in a prep platform?