# Rekal > Rekal is a voice-first study app that turns YouTube lectures, PDFs, and notes into AI-generated quizzes with spoken answers and AI grading. ## Product - [Rekal](https://rekal.app/): Product overview and links to download the mobile app. - [How It Works](https://rekal.app/#how-it-works): Add study material, answer quiz questions by speaking, and get feedback. - [SAT & ACT Prep](https://rekal.app/sat-act-prep): Practice question overview, voice-based study workflow, and frequently asked questions. - [Pricing](https://rekal.app/#pricing): Current Free and Student plan comparison. ## Learning approach - [Why It Works](https://rekal.app/why-it-works): Explanation of active recall, study difficulty, and the voice-first approach. - [The Science](https://rekal.app/science): Discussion of learning research, including the testing, production, and generation effects. ## Support and policies - [Contact Us](https://rekal.app/contact): Contact form for questions and feedback. - [Privacy Policy](https://rekal.app/privacy): Information about data collection, use, retention, and privacy rights. - [Terms of Service](https://rekal.app/terms): Terms for using Rekal, including subscriptions and AI-generated content.