SRS levels and intervals
Items climb eight levels with doubling intervals from 1 day to 256 days, then enter yearly maintenance. Wrong answers drop an item two levels.
Every item in your vocabulary sits at a level. The level decides how long Yalango waits before showing it to you again.
The ladder
| Level | Next review |
|---|---|
| 0 | New items - 1 day |
| 1 | 2 days |
| 2 | 4 days |
| 3 | 8 days |
| 4 | 16 days |
| 5 | 32 days |
| 6 | 64 days |
| 7 | 128 days |
| 8 | 256 days - the last ladder step |
| Mature | Once or twice a year, as maintenance |
Each level roughly doubles the wait. Answer an item correctly when it's due and it moves up one level. Get past level 8 and the item becomes Mature - it still comes back, just rarely, to keep the memory fresh.
A brand-new item sits at level 0 with no review date at all. Your first correct answer is what puts it on the schedule.
Review dates are spread by up to 5% either way, so a big batch of cards learned on the same day doesn't all come due on the same future day.
When you get something wrong
A wrong answer drops the item two levels and makes it due today. An item at level 5 goes back to level 3, not to zero, so one slip doesn't undo months of work.
The item also comes back later in the same session, usually 5 to 8 cards further on. This is called relearning, and it's why a session with mistakes runs a little longer than the number of cards you picked - up to about 50% longer at most. You have to get it right twice before it starts climbing again.
Answering early
If you practice an item well before it's due - less than halfway through its waiting period - the correct answer is recorded but the level and review date stay put. Answering early shouldn't let you rush an item to level 8 without ever actually having to remember it.
What it doesn't do
Yalango's scheduling is deliberately simple. Answers are either correct or wrong; there's no "easy / hard" rating and no per-item difficulty factor. Levels and intervals are the same for everyone.
Reading the level on an item
In Browse, each item shows Level n/8 or Mature, along with its next review date, its accuracy percentage, and how many times you've answered it. Expand an item with More details for the full history.