Smart Review
Spaced repetition that remembers for you
Biibo English schedules every word you learn and brings it back just before you would forget it.
How it works
What is spaced repetition?
Spaced repetition is a way of reviewing that follows how memory fades. Right after you learn a word you forget it quickly, but every time you recall it at the right moment the memory lasts longer. So instead of reviewing everything every day, you review each word at growing intervals: a day, a few days, a week, a month.
Smart Review in Biibo English does the scheduling for you with the SM-2 algorithm. Words you study in topics, books and lessons get their own schedule, and each day you see the words that are due.
How Smart Review works
- 1
Learn words in topics and books
Words you study in topics, books and other word lessons get a review schedule of their own, with no list to build by hand.
- 2
Open your daily list
The To review tab shows the words due today. The forecast shows how many are coming today, tomorrow and over the next seven days.
- 3
Review with a practice mode
Pick flashcards, quizzes or another mode. When a flashcard is not remembered yet, you rate how hard it was and SM-2 reschedules the word.
- 4
Watch words move
Words move from Learning to Mastered as their intervals grow. Your average memory strength is compared with yesterday.
- 5
Fix what you get wrong
Words you answer wrong also go into Mistakes, a separate list you can practise like a topic until you get them right.
What you get
Less time, more words kept
You only review what is about to fade, so a few minutes a day keeps a large vocabulary alive.
A clear daily goal
One number tells you what to review today, and the forecast shows what is coming.
An honest picture of your memory
Quick analysis groups due words into fading, weak recall and new but hard, so you know why each word is there.
Free
Smart Review and the Mistakes list are free on every plan.
Frequently asked questions
What is SM-2?
SM-2 is a well-known spaced-repetition algorithm. After each review it adjusts a word's ease and interval: words you recall easily come back later, words you struggle with come back sooner.
How many words should I review each day?
Review the words that are due. If the list gets long, it is better to review a little every day than to skip days and catch up later.
What is the difference between Smart Review and Mistakes?
Smart Review is about words you are about to forget. Mistakes collects words you answered wrong, and a word leaves Mistakes when you answer it correctly.
Do I need to add words by hand?
No. Words you study in topics, books and word lessons are scheduled for you.
Is Smart Review free?
Yes. Reviewing, the forecast, the dashboard tabs and Mistakes are all free.