Spaced repetition
Review right before you forget — remember without cramming
Doopi uses the Leitner system to decide which cards are due today. All you do is answer “got it” or “not yet”.
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Grading
One gesture per card
Swipe right or press → when you know it, swipe left or press ← when you don’t. Slipped? Press Z to undo and the schedule goes back to how it was.
- Space to flip, I for card insights
- Shuffle so you don’t memorise the order
- Study only unknown, starred or linked cards
Leitner system
Six boxes, growing intervals
New cards start in box one. Each correct answer moves a card up and pushes the next review further out: 1, 2, 4, 7, 14, then 30 days. Forget it and it goes back to box one.
- Easy cards show up rarely, hard ones more often
- Each deck’s progress is visible in the library
- No schedules to plan, nothing to remember
Habit
See your progress every day
Home shows your study streak, reviews over the last seven days and an activity calendar that keeps you consistent.
- Current streak and your longest streak
- A review chart from 30 days up to a year
- Resume an unfinished session in one tap
How it works
Spaced repetition in three steps
Decades of memory research, packed into a single button.
- 1
Learn new cards
New cards start in box one and come back the next day.
- 2
Answer honestly
Mark “got it” only when you really recall it — no cheating yourself.
- 3
Let intervals grow
Intervals stretch with your memory until a card only needs a visit once a month.
Frequently asked questions
What is spaced repetition?
A way of reviewing with growing gaps between sessions. Recalling something just before you would forget it makes the memory stronger, so you review less often and remember longer.
How does the Leitner system work in Doopi?
There are six boxes with intervals of 1, 2, 4, 7, 14 and 30 days. A correct answer moves the card up a box; a miss sends it back to box one for tomorrow.
How long should I study each day?
10–20 focused minutes is enough. What matters is not skipping days — the streak on your home page helps you keep the habit.
What if I grade a card by mistake?
Press Z (or the Undo button) to take back the last grade; the card returns to its previous box and schedule.
Start studying smarter today
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