PrepGraph products
What does PrepGraph make?
Three practice tools. The main PrepGraph app covers product management, data science, data engineering and AI product interviews with 306 questions and AI-scored written answers. Two free companions cover admissions tests. All counts as of October 2026.
PrepGraph
AI-led practice for Product Management, Data Science and Data Engineering interviews. You answer in writing, an evaluator scores against a rubric, and a concept graph tracks what you have mastered. Open PrepGraph or browse the question bank.
PrepGraph GMAT
Free GMAT practice across all five formats: Problem Solving, Data Sufficiency, Reading Comprehension, Critical Reasoning and Sentence Correction. Difficulty tagged, progress syncs across devices. 1,388 questions, free, as of October 2026.
PrepGraph GRE
Free GRE practice from the official Big Book, covering all nine question types across 27 full practice tests. 4,751 questions, free, as of October 2026.
GMAT is a registered trademark of the Graduate Management Admission Council and GRE of Educational Testing Service. Neither endorses or is affiliated with PrepGraph.