Preparing to launch my app changing how students study & learn. Anyone else launch in this space?

I am in the final process of developing and improving my GradesAI software. It will have the ability to provide students a software that can predict the most likely questions to be on their tests and quizzes using the students' own course materials. Each answer is provided with an explanation to provide in-depth context and a thorough understanding of the subject. Has anyone else in the community launched a successful educational or learning app? Would love to hear any feedback, questions, opinions, or just your story. .