There are 5000 chinese words of HSK6. You can enter the number of the word you want to begin with( for example 1) , and the number of the end of the loop for example 10), then you click through the words, each word comprising of chinese character, pinyin pronunciation and English meaning. After each word you have clicked through, you can mark the word as known. In this example
the first round goes from 1 to 10, then it starts again at word number 1, then second round, where only the words get repeated, which you didn't know, and so on until you know all 10 words.
HSK tests are very useful if you want to study or work in China. They range from HSK1(easy) to HSK6(very difficult) The HSK vocabulary has been accumulated by
the Confucius Institute, and HSK tests(including grammar and fluency of speaking) are getting supervised by Confucius Institutes all over the world.
My HSK6 accumulation is not a dictionary and it doesn't have a search function. It is a pure cramming app with the
flashcard/repetition method. The app is alphabetically ordered, not by difficulty level.In this repetition process, before the chinese character, the HSK level is shown.
I recommend to learn each 5 or 10 words at a time