- You need to repeatedly recall your memory, according to the "Forgetting Curve".
- You have no time to memorizing words.
- You feel so bored to repeat memorizing words.
- You always forget to review the memorized words, so they will disappear in your memory.
- It will remind the word to you according to "Forgetting Curve".
- It pushs words to you, so you will never forget review words.
- You can use it when you are working or doing something other, so you don't need to spend 1 or 2 hours a day on this boring job.