Keep-Word Note play online

[Forgetting Theory]
According to Ebbinghaus's theory of forgetting, over time, we gradually forget what we have learned.

[How to overcome oblivion?]
"Review" slows the rate of forgetting. And if you "repeat" a review, it's more likely to become long-term memory.
The Keep app notifies you when you need to review. Now, don't worry about when you're going to do a review. Just add a word and Keep will schedule a review for you.

[Memory Level]
The first word added has a memory level of 1. When reviewing, if you remember, the level increases by 1. If you can't remember, go back to level 1. For example, if you can't remember from level 3, it will be level 1. Level 6 is the last, and level 6 is the long-term memory word. Make it up to level 6.

[Review scheduling according to memory level]
Memory level 1: after 9 hours
Memory Level 2: After 2 days
Memory Level 3: After 7 days
Memory Level 4: After 14 days
Memory level 5: After 32 days