Reading passively leads to forgetting 70% of material within 48 hours. Challenge Study Engine is a desktop workspace built to convert raw notes into high-retention active recall sessions. Stop juggling separate apps; everything is handled in one unified, distraction-free environment.

Core Features:

BYOK AI Chat: Query notes and summarize chapters. Plug in your own API key to control costs—no monthly SaaS fees.

Planner & Analytics: Map out sessions, set target parameters, and visualize progress with detailed analytics.

Integrated Focus Timer: Track active study blocks and hit daily goals without relying on your phone.

Gamified Recall Challenges: Test knowledge through interactive games. The engine evaluates accuracy and recall speed to track mastery.

Automated Spaced Repetition: The “Due for Review” queue tracks memory decay and schedules topics optimally.

Document Ingestion: Drag and drop .pdf, .txt, or .md files directly into the workspace.

Built-in PDF Reader: Read, highlight, and manage source materials directly in-app.

Offline Mode: Core features like the timer, PDF reader, and local study queues remain fully functional without internet.