Word Pool application is a vocabulary learning application that allows you to test how many words you know in the foreign language you want to learn. The application shows you random words from the word bank in the first place and asks you if you have already learnt them, then the words you add to the word pool by saying that you have learnt are mixed and tested whether you have learned by asking with different answers. wrong answers are transferred back to the word bank for you to learn again. In addition,