Small by design
Simulate review intervals, test your memory, build vocabulary cards, and clean overloaded study decks.
Keep a copy. Keep control.
A backup includes your saved decks, tool inputs and recall progress. Import merges the backup into this browser, replacing entries with matching keys.
A studio on your device.
Parsing, recall grading, deck cleanup and PDF generation happen in your browser. Your tool inputs, decks and review sessions are saved in local browser storage. No account or upload is needed. Another browser or device has a separate workspace; use a JSON backup to transfer your work.
What offline means here
After a successful first visit, the site caches its pages and application files for later offline use in supported browsers. Allow that first load to finish before disconnecting. Browser cache eviction or clearing site data can remove offline access and saved work. Private browsing may discard data when the session closes. Download backups regularly.
The hosting service receives ordinary requests when you visit online, including network information such as your IP address. Your study input is not sent with those requests.
Useful explanations, honest limits
Each guide includes worked examples, a reusable template and practical checks. Verify subject facts against your course sources. The scheduler makes SM-2 arithmetic visible; it does not predict your individual memory or promise exam results. The tools do not fact-check answers.
Made for different ways of studying
Use the keyboard to navigate every control. In the recall player, Space reveals an answer and keys 1–4 grade it when focus is outside form controls. Text, TSV, CSV and JSON exports preserve editable material. PDFs are visual print sheets; keep a text export for accessible reading.