Whetstone
2026
Whetstone turns the Markdown notes you already write into challenging practice questions — not trivia recall, but questions built around the analytical moves that make a topic genuinely click.
Point it at any folder of Markdown notes (an Obsidian vault works perfectly) and start practicing.
- Adaptive difficulty — questions sharpen as your skill grows, per topic
- Daily practice — one click, topics picked for you by what’s due
- Multiple question types — multiple choice, select-all, numeric
- Beautiful reading experience — LaTeX math, code blocks, adjustable typography
- Streaks, accuracy, and an activity graph to keep you honest
- Local-first — your notes and progress stay on your Mac
- Bring your own Anthropic API key for question generation
Whetstone is for students, self-learners, and anyone who takes notes and wants them to actually stick.
Available for macOS currently. Windows, iOS and Android apps planned.