Phosphor: Forgetting Curve

Your notes fade. Phosphor brings them back.

Memory works like phosphor: it glows after you learn something, then slowly dims. Phosphor tracks that fade for every card you make and brings each one back just before it goes dark, so a short review re-strikes it.

TURN ANYTHING INTO STUDY MATERIAL
Start from a topic, a video lecture link, or text you paste in. Working as a video summarizer and note writer, it can summarize video lectures. Phosphor writes structured notes and a summary, then builds flashcards and quizzes from them. Every card links back to the part of the source it came from. Think of it as an AI flashcard maker and summary generator that also remembers to test you.

SPACED REPETITION WITH FSRS
Cards are scheduled with FSRS, a modern spaced repetition algorithm. Cards you find hard come back sooner. Cards you know well wait longer. You grade each answer and the schedule adjusts to you.

BEAT THE FORGETTING CURVE
The forgetting curve, first measured by Hermann Ebbinghaus, is the steady drop in what you remember after you learn it. Phosphor tracks your own Ebbinghaus forgetting curve, card by card. Retrieval practice, pulling an answer out of memory instead of rereading, is what flattens it. Phosphor is built around that one habit: short active recall sessions, timed to the moment each card starts to fade.

REVIEW FROM A REMINDER
When cards are due, a reminder arrives with the question, and you can grade your answer from the notification.

MORE THAN ONE WAY TO BE TESTED
Multiple choice quizzes, cloze deletions, concept maps, confusable pair drills and free recall. Answering the same card the same way every time stops teaching you quickly, so Phosphor mixes the format.

ASK YOUR MATERIAL QUESTIONS
Ask about a lecture, or across everything you have saved, and get answers grounded in your own notes.

BUILD A COURSE, NOT A PILE
Turn a playlist into an ordered course with chapters, so a long series becomes something you can finish.

YOUR CARDS STAY YOURS
Export any deck to Anki whenever you want. No lock-in.

WHO IT IS FOR
Medical and nursing students. Law students. Engineering and computer science students. Language learners. Anyone preparing for an exam from lectures, and anyone who has finished a course and remembered little of it.

Available in 32 languages.

Phosphor Pro raises the daily limits on generation, quizzes, decks and courses.

Recent changes:
Fixes: app analytics now reach Google Analytics. Includes the 1.0.9 changes: math rendering, written practice, start-here guide, Recent tile title fix.