How it works
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01
Bring your own material
Your PDFs, your notes, your previous years' papers. We host no content and sell none — what you study is yours and stays yours.
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02
It becomes atoms
One fact per card, tied to the syllabus node it belongs to. Write them yourself or have them drafted; either way a human checks them before they are ever scheduled.
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03
Reviews arrive when due
Not when you feel like it, and not everything at once. The schedule is computed from how memory actually decays, and you can open the arithmetic for any card.
Coverage says you have read it. Retention says you would still know it.
Most tools count what you have done. When these two disagree, the gap is the most useful thing on the page — and it is the reason this exists.
Coverage
82 %
Weighted by what the papers actually ask, not by what the notification lists.
Retention Health
47 %
The honest "do you still know it" number, computed from the memory model.
Illustrative. Every real number opens to its formula, its inputs and a plain sentence — a number you cannot interrogate is not evidence.