For anyone with something worth keeping.

Eight ways in

1. Exams and entrance testsWide syllabuses where long-term retention decides the outcome. Set a goal date and Ebbio works backward along the forgetting curve so your memory peaks on the day.
2. Professionals keeping their knowledgeMedicine, law and other fields with an enormous vocabulary that stays in use for a lifetime. Organise by field with collections and tags; only the items you are actually about to forget come up.
3. Building skills at workNew procedures and domain knowledge, made yours steadily while doing the job. Things that never fit on a flashcard, like a sequence of steps or internal terminology, run on the same mechanism.
4. Language learners, exam or notTravel, interest, moving abroad. Not only vocabulary and grammar but the small facts, laws and customs of where you are going, all in one place.
5. Lifelong learningKeeping what you read and the fields you are curious about, without losing them. One item a day, kept up, becomes hundreds.
6. Engineers and creatorsLanguages, tools and techniques that need to stay at hand. As you use something less, the interval widens instead of the knowledge disappearing.
7. Noticing memory change with ageFor anyone who has started to notice small lapses and wants to face them. A small, fixed amount each day, timed for when you are about to forget.
8. Worry about forgettingAt any age, when the fear of forgetting what you learned is the motivation itself. Recall probability is a number and a graph, so the sense of holding on is visible.

The loop everyone shares

Add it, review it, add what you managed today, close the app. Opening Ebbio shows only what is due today. There is no deciding what to study, and that simple daily repetition is what keeps hundreds or thousands of pieces of knowledge alive over the long term.